ACCURATE ELECTRONICS 104003C Handmatig - Pagina 10

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ACCURATE ELECTRONICS INC
WWW.ACCURATE.ORG
PO BOX 1654 97075-1654 8687 SW HALL BLVD 97008
TABLE 5. Test Procedure.
Test
Test Procedure
Receive
Connect properly terminated
TMS (receive) to RX OUT jack.
Level
Insert 1000Hz test tone at
specified level into RX IN jack.
Transmit
Connect properly terminated
TMS (receive) to TX OUT jack.
Level
Insert 1000Hz test tone at
specified level into TX IN jack.
Tone
Connect selected loopback tone
at level indicated in CLR to RX
loopback
IN jack; after 2 seconds change
frequency to 1kHz; measure
output at TX OUT jack.
Tone
Change test signal to selected
loopback tone.
loopback
release
FIGURE 1. CIRCUIT DESCRIPTION.
This document contains proprietary information and is supplied for identification, maintenance, engineering evaluation or inspection purposes only and shall not be duplicated or disclosed without written
permission of: ACCURATE ELECTRONICS INC By accepting this document the recipient agrees to make every effort to prevent unauthorized use of this information.
Practice Section 104003C Rev A
BEAVERTON OR USA 503.641.0118
Normal
results
Signal level
-Power
corresponds to gain
-Wiring
or loss setting.
-Proper impedance termination
(check for double termination)
-Impedance switches (S2 and S4) properly set
-Level/Equalizer switches (front-panel RX LEVEL and RX EQL) properly set
-Replace module and re-test
Signal level
-Power
corresponds to gain
-Wiring
or loss setting.
-Proper impedance terminations (check for double terminations)
-Impedance switches (S2 and S4) properly set.
-Level/Equalizer switches (front-panel TX Level and TX EQL) properly set
-Replace module and re-test
LPBK LED lights.
-Transmit and receive levels properly aligned.
Measured transmit
-Correct looopback tone selected at S3.
level within +1dB of
-Lower loopback tone level 10dB and retest.
transmit level
-Replace module and retest
indicated on CLR.
LPBK LED off after
-Momentarily operate manual loopback (ground pin 1).
approximately
-Check transmit pair for shorted pairs.
1Second.
-Replace module and retest.
January 2014
FAX 503.646.3903
If Normal Conditions
Are Not Met, Verify:
10