ACCURATE ELECTRONICS 104001C Посібник - Сторінка 9
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WWW.ACCURATE.ORG
PO BOX 1654 97075-1654 8687 SW HALL BLVD 97008
TABLE 5. Test Guide Checklist.
TEST
TEST PROCEDURE
Receive Level
Arrange transmit portion of transmission measuring set
(TMS) for 1004Hz tone output at –20dBm if module's
RCV channel is optioned for gain or at 0dBm if
module's RCV channel is optioned for loss. Also set
transmit portion of TMS for facility-side interface
impedance selected on module. Connect 1004Hz signal
to RCV in jack. Arrange receive portion of TMS for
terminated measurement at terminal-side inter-face
impedance selected on module, and connect it to RCV
out jack.
Receive
Maintain connections as above. Adjust RCV EQL
Equalization
switches for no equalization (all switches set to out).
Adjust module's receive output level for 0dBm at
1004hz. Change input frequency to 2804Hz and add
equalization (up to maximum) by setting RCV EQL
switches to in one by one.
Transmit Level
Arrange transmit portion of TMS for 1004Hz tone
output at –20 dBm if module's XMT channel is optioned
for gain or at 0dBm if module's XMT channel is
optioned for loss. Also set transmit portion of TMS for
terminal-side interface impedance selected on module.
Connect 1004Hz signal to XMT in jack. Arrange
receive portion of TMS for terminating measurement at
facility-side interface impedance selected on module,
and connected it to XMT out jack.
Transmit
Maintain connection as above. Adjust XMT EQL
Equalization
switches for no equalization (all switches set to out.
Adjust module's transmit output level for 0dBm at
1004Hz. Change input frequency to 2804Hz and add
equalization (up to maximum) by setting XMT EQL
switches to in one by one.
FIGURE 1. CIRCUIT DESCRIPTION.
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Practice Section 104001C Rev B
BEAVERTON OR USA 503.641.0118
FIGURE 1. CIRCUIT DESCRIPTION.
NORMAL RESULTS
IF NORMAL CONDITIONS ARE NOT
MET, VERIFY:
Signal level indicated on TMS
- Power
corresponds to receive gain or
- Wiring
loss setting on module.
- Proper impedance termination
(check for double termination)
- Impedance switches (S1 and S3) properly set
- Level switches (RCV gain/loss and RCV level)
properly set
- Replace module and re-test
Receive output level at 2804 Hz
- Input level at 2804Hz same as at 1004Hz
increases to +7.5 dBm as
- Terminating impedance correct
equalization is added.
Signal level indicated on TMS
- Power
corresponds to transmit gain or
- Wiring
loss setting on module.
- Proper impedance terminations (check for double
terminations)
- Impedance switches (S1 and S3) properly set.
- Level switches (XMT gain/loss and XMT level)
properly set
- Replace module and re-test
Transmit output level at 2804
- Input level at 2804Hz same as at 1004Hz
Hz increases to +7.5 dBm as
- Terminating Impedance correct
equalization is added.
January 2014
FAX 503.646.3903
9