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where:
599 addresses receiver number 99 (use the number required for addressing the
receiver undergoing test),
G is a "GET" command asking for operating parameters,
CR is "Carriage Return."
d. No'te the remote controller display. If any operating parameter information has been '
displayed at all, the remote interface is working properly. If no data is returned or
displayed, refer to Section'V of this manual and replace the A6Al module if required:,
(Refer to Section II. Paragraph 2.3.3.2 for installation procedure.) This completes the
Remote Interface Option Check.
3.3.1.3
ISB Option Check
The purpose of the ISB Option Check is to verify the proper operation of the AS ISB and
the ISB/SSB link on the A4 Main IF module. To perform the ISB Option Check:
a. Ensure that the preliminary procedures outlined in Paragraph 3.3.1 have been
performed.
b. Refer to Section II, Paragraph 2.3.3.4 step 2 and set the I-LSB line level. If the line
level can be set, the IF portion ·of the AS module and the ISB/SSB link are functioning
properly. If the line level cannot be set (no signal indication or low signal indication),
replace the AS module. (Refer to Section II, Paragraph 2.3.3.3 for installation procedures.)
c. Connect a headset to the PHONES jack on the receiver front panel and adjust the
AF GAIN potentiometer until a signal is heard. If a signal can be heard, the audio
portion of the AS module is operating properly. If no signal is heard, replace the AS
module.
d. If both steps band c produce satisfactory results, the AS ISB option is fully operational.
This completes the ISB Option Check.
3.3.2
RA6790/GM
Receiver/System Interface Check
The purpose of this check is to verify proper operation of the receiving system once the
Receiver is installed in its operating location. Prior to performing this check, ensure that the Receiver
Options Installation Check(s) outlined in Paragraph 3.3.1 have been completed. To perform the
Receiver/System Interface Check:
a. Physically install the Receiver in its operating location.
b. Connect the system RF signal source (antenna; output from multicoupler. etc.) to the
RF IN jack J I on the receiver rear panel.
c. Connect the system remote control device (if used) to connector A6AI WlJ 1 on the
receiver rear panel.
d. Connect the system audio line to the AF OUT connector 13 on the receiver rear panel.
3-9
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