| Ifonthing to hte contrary is stated,the values given below are vaiid for all operatingconditions and device settings within the rated rated ranges of use for a.c.livevoltage,a.c.line frequency and ambient temperature |
| Analoggenerator |
| Generator output |
| BN984/01;984/51 |
balanced,floating,3-pin CF connector |
| BN984/02;984/52 |
balanced,fem.connector compatible with WECO310 |
| BN 984/05;984/55 |
balanced,fem.connectorcompatible with 1212 APS |
| Outputimpedance,switch-selectalbe |
600,850,900Ω and complex |
| Permissibled.c.voltage to earth |
≤60V |
| Sendsignals |
| Sinusoidal signals |
| Frequencyrange |
20Hz to 72kHz |
Group-delaymeasuring signal(PCM-4 only)
Similar to the measuring signal described in ITU-URec.O.81 and IEEE Standards |
| Measuringfrequencies |
292,500,604,1000,1792,2604,2792 and
3396Hz |
| Modulationfrequency selectable |
41.66 or 83.33Hz |
| 4-tonesignal Four equal level tones at |
857,862,1373 and 1388Hz |
Sendlevels
Display of power levels(dBm0),can be switched over to voltage levels(dB0)
Relativelevel |
| Level entry in steps of0.001dB from |
-19.9 to +9.9dBr |
Displayedon screen in steps of 0.1dB
Levels relative to 1mW at a point of 0 rel.level
Levelentry in steps of 0.01dB
Level range in the preferred range |
| for relative level |
-17 to +3dBr,at 600Ω |
| fornose(.50 to 550Hz),at least |
-60.0 to +2.0dBm0 |
| forsine signals(f≧200Hz),at least |
-60.0 to +10.0dBm0 |
| forall other signals,at least |
-30.0 to +2.0dBm0 |
| Analogreceiver |
| Receiver input |
see"analoggenerator output" |
| Additionalinput impedance |
≧30kΩ |
Two-wireinput and output
The tow-wire connector can be terminated with a complex impedancefor transhybrid loss measurements |
Receivelevels
Calibratin.see "analog generato"
Relative levels,see"analoggenerator" |
Levels relative to 1mW at a pontof 0 rel.level
Level range in the preferred range of the relative level-9.9to +9.9dBr and at 600Ω |
| signal levelmeasurements,at least |
-60.0 to +10.0dBm0 |
| noiseand crosstalk measurements,at lease |
-80.0 to 0 dBm0 |
| Receivefilters |
| Wideband filters passband range |
Narrow-bandfilters passband at : |
200Hz to4kHz
20Hz to 4kHz
330Hz to 3100Hz
20Hz to 72kHz
4.6kHz to 128kHz(PCM-4only) |
301Hz
813Hz
1014Hz
3343Hz
350bis 550Hz |
Filters for weighted nose measurements
Psophometerfilter(ITU-T Rec.P.53/O.41)
C-message weighting filter to North American standsrds3kHz flat filter to North Amarican standards
Psophometer filter with 2kHz notch-filter
C-messageweighting filter with 2kHz notch-filtr
Bandpass 300 to 3350Hz,with 2 kHz notch-filter |
Digitalsignal generator
PCM frame structure
BN 984/01 and BN 984/51
32 channelPCM frames containing: |
| 30 telephone channels |
toITU-T Rec.G.704 Para.3.3 |
| or 31telephone channels |
time slots 1 to 31 |
| or32 telephone channels |
all time slots |
| BN984/02,BN 984/52,BN 984/05 and BN 984/55 |
| Selectablebetween |
T1"norm"12FRM/MFRM to ITU-T G.704
Para.3.1and T1"extd."24 FRM/MFRM to ITU-T G.704 Para.3.1 |
| Telephonechannels per frame |
24 |
| Channelsequences |
D3/D4,D2 or D1D |
| Signalling |
| μ-law |
CCIS or CAS(75/6) |
| A-law |
CCIS |
Generatoroutputs
BN 984/01 and BN 984/51
Interface characteristics comply with ITU-TRec.G703 |
| Line codes |
NRZ,AMIand HDB3 |
| Coaxial output |
Versacon9 Universal Connector
System,adaptable to all common connectors |
| Outputimpedance |
75Ω |
| Balanced output |
3ploe,CF connector |
| Output impedance |
120Ω |
BN984/02,BN 984/52,BN 984/05 and BN 984/55
Interface characteristics comply withITU-T Rec.G703 and North American standards |
| Linecodes |
AMI and B8ZS |
| Output pulsecharacteristic |
to AT&T
Technical Advisory No.34 |
| W-bitinsertion |
ON or OFF |
| Balancedoutput |
fem.connectro compatible with WECO310(BN 984/02 and984/52)1214APS(BN 984/05and 984/555) |
| Outputimpedance |
100Ω |
Operation andclock supply
Loop-through operation
A test pattern is injected into onetime slot of a PCM frame which has been looped through the PCM-4 |
BN984/01 and BN 984/51
Generator operation |
| frominternal clock |
2048kHz±25*10-6 |
| orexternal clock |
2048kHz ±100*10-6 |
| orexternal 8 kHz sync-signal |
8kHz ±100*10-6 or clockderived from receiver signal |
| Digitalloops |
| 2Mbit/s loop: |
all timeslots are switched through |
| 2Mbit/sloop: |
selected time slots can be switched through (independentselection of the receive and send channel is possible) |
| 64 kbit/sloop: |
at relevant interfaces(Option) |
BN984/02,BN 984/52,BN 984/05 and BN 984/55
Generator operation |
| frominternal operation |
1544±25*10-6 |
| orexternal clock |
1544 ±100*10-6 |
| orexternal 8kHz sync.signal |
8kHz ±100*10-6 or clock derivedfrom receiver signal |
| Digitalloops |
| 1.5Mbit/s loop: |
all timeslots are switched through |
| 1.5Mbit/sloop: |
selected time slots can be swithced through (inedependentselection of the receive and send channel is possible) |
| 64kbit/sloop: |
at relevant interfaces(Option) |
Digitalwords for telephone channels
BN 984/01 and BN 984/51 |
| Injectionof a digital signal in one of the telphone channels 1 to 30(or 31,32)or in alltelephone channels,or in all telphone channels except the selected channel. |
| Encodinglaw,selectable |
A-law ro μ-law |
| BN984/02,BN 984/52,BN 984/05 and BN 984/55 |
| Injectionof a digital signal in one of the telephone channels 1 to 24,or in all telephonechannels,or in all telepohe channels except the selected channel. |
| Encodinglaw,selectable |
A-law or μ-law |
Sendsignals
Sine signals |
| Frequency range |
20Hzto 3.99kHz |
| Send level rage(in stepsof 0.1dB) |
-60.0 to +7.5dBm0 |
Noisesignals
Pseudorandom noise signal |
| 350Hzto 550Hz complies with |
300 to 3400Hz |
| Sendlevel range(0.1dB steps) |
-65.0 to 0.0dBm0 |
| Widebandnose sihnal for telpbhone channels |
| Noise band |
300to 3400Hz |
| Send level range |
-65.0to 0.0dBm0 |
| Conventional telephone signal |
complieswith ITU-T Rec.G.227 |
| Send levelrange |
-30.0 to 0.0dBm0 |
| Echo returnloss and singing return loss signals to North American standards |
| Noiseband of ERL-signal |
560 to 1965Hz |
| Noiseband of SRL-signal |
260 to 500Hz |
| Noiseband of SRLH-signal |
2200 to 3400Hz |
| Sendlevel range |
-30.0 to 0.0dBm0 |
| Groupdelay measuring signal |
| See: |
"Analoggenerator signals" |
| Send levelrange |
-30.0 to 0.0dBm0 |
| 4-tonesignal |
| See: |
Analoggenerator signals" |
| Send level range |
-30.0to 0.0dBm0 |
Idle channel signals
Anyfixed word can be silected.It is also possible to select words which vary randomlyor periodically between two neighbouing values |
Bitpatterns
The following are available for bit error measurements:
Pseudorandomsequence complying |
| with ITU-TRec.V.52 |
29-1 bits long |
| Pseurdorandomsequence complying |
| withITU-T Rec.0.152 |
211-1 bits long |
User-programmable8 bit word
External analog signal(via VAR.MODE)
An external analog signalcan be input via an internal PCM coder and injicted in one telephone channel oroutput via 64kbit/s interface |
Testfacilities and error insertion
BN 984/01 and BN 984/81
AIS transmission(continuous sequence of "1"s) |
| Frame alignmentbit error ratio |
10-3 or 10-4 |
| Framealignment word errors |
2 or 3 in 4 |
| Multiframealignment errors of |
1 or 2 in 2 |
| CRC-4error ate settable in steps of |
0.1% |
| inthe range |
0.1 to 99.9% based on 1s(1000CRC-4 words) |
BN984/02,984/52,984/005 and BN 984/55
ALL ONES transmission
Bit 2 alarm transmission
Bit2 is set to "0" in each channel
Sbit alarm(T1"norm")transmission
S-bitin frame 12 is set to "1" m bit alarm(T1"extd")transmission
Eight"0"-bitsalternating with eight"1"-bits |
| FAS errors |
1in 6 bits or 2 in 4 bits |
| S-bit/MFASerrors |
1 or 2 in 6bits |
| CRC-6error rate settalbe in steps of |
0.3% |
| inthe range |
0.3 to 99.7% based on 999 ms(333 multiframes) |
Signallingfacilities
BN 984/01 and BN 984/51
Static signalling bits
Transmissionof signalling bits a b c d in time slot 16 for selected and unoccupied telphonechannels
Signalling byt value settable via menu
Dynamic signalling bits
Signallingbit value for selected telephone channel set externally via aus.parallel input |
BN984/02,BN 9848/52,BN 984/05 and BN 984/55
Static signalling bits
Transmissionof signalling bits A, B/A,B,D,D for selected and unoccupied telephone channels
Singanllingbit value settable via menu
Dynamic signalling bits
Signaling bit valuefor selected telephon channel set exgernally via aux.parallel input for CAS(75/6)only,orS/m bit value set externally via contradirectional 4 kbit/s input |
Digitalsignal receiver
PCM frame struture see "digital signal generator"
Receiverinputs
BN 984/01 and BN 984/51
Interface characteristis comply with ITU-TRec.G.703 |
| Line code |
NRZ,AMIand HDB3 |
| Coaxial input |
75Ω or>3kΩ |
| Balanced input |
12Ωor >3kΩ |
| Input signal monitoring via LEDs: |
NOSIGNAL,AIS ,NO FRAME,NO MULTIRRAME |
BN984/02,BN 984/52,BN 984/05 and BN 984/55
Interface characteristics comply withITU-T Rec.G.703 and North American standards. |
| Linecodes |
AMI and B8ZS |
| Balancedinput |
fem.connector compatible with WECO 310(BN 984/02,984/52);1214APS(BN684/05,984/55) |
| Input impedance |
100Ωor >3kΩ |
| Input signal monitoringvia LEDs: |
NO SIGNAL,ALL ONES,NO SYNC,REMOTE ALARM |
Evalutionof digital word in telephone channels
BN 984/01 and BN 984/51
Selectinga telphone channel
A code word from one telephone channel 1 to 30(or 31,32)canbe evaluated.
Code word measurements |
| Encodinglaw,selectable |
A-law or μ-law |
| Receivelevel range,at least |
-80 to +6dBm0 |
BN984/02,BN 84/52,BN 984/05 and BN 984/55
Selecting a telephone channel
Acode word from one telephone channel 1 to 24 can be evaluated
Code word measurements |
| Encodinglaw,selectable |
A-law or μ-law |
| Receivelevel range ,at least |
-80 to +6 dBm0 |
Receivefilters see"Analog receive "
Bit error measurements
on telep[honechannels(64 kbit/s).Shown as a histogram with the X axis representing measuringperides or channels. |
| Bit pattern: |
see"digitalsignal generagor send signals" |
Error conutson FAS/MFAS and CRC-signals
Signalling distortion measurements(option;PCM-4only)
Method:
Measure the duty cycle deviation of a rectangular signal
Generator |
| Frequencysetting |
10Hz or 20Hz |
Duty cyclesettable in step
Analog output(back panel) |
| Outputimpedance,mark |
<30Ω |
| space |
>20kΩ |
| Max.switchingvoltage |
200mA |
| Max.switchingvoltage |
70V |
| Signallingreceiver Measuring range |
±10ms |
| Resolution |
0.1ms |
| Analoginput(back panel)Input impedance (connected internally to -15V) |
750Ω |
| Shor-circuitcurrent |
10mA |
Evaluationand monitoring of words and bits
BN 984/01 and BN 984/51
Monitor ing via8 LEDs(bits 1 to 8)
Codewords of selected channel,FAS,NOT RAS ,MFAS NOT MFASSignalling bits a b c d (TX and RX)
Evalution on screen (MODEB91)
Codewordsof selected channel,FAS,NOT FAS,MFAS,NOT MEFASM\,Signalling bits a b c d(RX) |
BN984/02,BN 984/52,BN 984/05 and BN 984/55
Monitoring via 8 LEDs(bits 1 to 8)
Codewordsof selected channel,FAS or MFAS,S bits,
Signalling bits ,B/A,B,C,D |
Auxiliaryoutputs(back panel)
Activation signal for crosstalk measurements
Analogdecoder output for decoded signal of selected telephone channel
Signallingoutput
Error and alarm outputs
Video signal output |
GeneralSpecifications
Power supply
Rated ranges of use for a.c. line voltage,12%to +10% |
| swithch-selectable |
110/117/127/220/227/237V |
| BN984/05 and BN 984/55 |
only 100/110/117/200/210/217v |
| Ratedrange of use of a.c.line frequency |
47.5 to 63Hz |
| Powerconsumption |
approx.150VA |
| Safetyclass to IEC 348 and VDE 0411 |
Class 1 |
Ambienttemperatur
|
|
| Ratedrange of use |
+5 to +0℃ |
| Storageand transportation |
-40 to +70℃ |
| Dimensions |
| Bench-topinstrument(w*h*d in mm) |
477*244*425 |
| Weight |
approx.25kg |
