Motorola ASTRO Digital Spectra, Instruction Manual

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Appendix A - Cross Patch Configuration
Level Settings
Consolette 1 to Consolette 2 Path
1. Connect Consolette 1 to Consolette 2 via the cable described above.
2. Connect a signal generator or communications analyzer to Consolette 1.
3. Connect Consolette 2 to a modulation analyzer or communications analyzer. Set the analyzer up to measure
deviation level.
4. Apply a –47 dBm on channel RF signal modulated with a 1 kHz tone at 60% FSD into Consolette 1. Consolette
1 will now be receiving and Consolette 2 will be transmitting.
5. Adjust the RX Audio path potentiometer (R111 on AIB, R545 on TRC) on Consolette 1 until 60% FSD is
obtained on the Consolette 2 modulation analyzer or communications analyzer.
6. Turn off the –47 dBm RF signal.
Consolette 2 to Consolette 1 Path
1. Connect Consolette 2 to Consolette 1 via the cable described above.
2. Connect a signal generator or communications analyzer to Consolette 2.
3. Connect Consolette 1 to a modulation analyzer or communications analyzer. Set the analyzer up to measure
deviation level.
4. Apply a –47 dBm on channel RF signal modulated with a 1 kHz tone at 60% FSD into Consolette 2. Consolette
2 will now be receiving and Consolette 1 will be transmitting.
5. Adjust the RX Audio path potentiometer (R111 on AIB, R545 on TRC) on Consolette 2 until 60% FSD is
obtained on the Consolette 1 modulation analyzer or communications analyzer.
6. Turn off the –47 dBm RF signal.
Radio-Wide Changes Using CPS
The Cross Patch uses the SPKR_UNMUTE signal from Consolette 1 as a PTT signal to PTT Consolette 2.
Furthermore, the SPKR_UNMUTE signal is derived from voltage changes on the speaker leads. The speaker
voltage changes if voice audio is present or if alert tones are present. Therefore, all the Alert Tones should be
turned OFF using CPS. This will prevent unintended mobile PTTs. For example, if TX Clear Alert Tones are enabled,
when Consolette 1 receives a signal, it PTTs Consolette 2. This sends an alert tone to Consolette 2's speaker, which
then causes Consolette 1 to transmit, etc., causing cyclical keying and unkeying of both Consolettes.
To disable the Alert Tones, disable the following fields in ASTRO Spectra or ASTRO Spectra Plus CPS:
1. Radio Configuration Radio Wide
→
Alert Tones
- Alert Tones Disabled
- Power Up Self Test Alert Tone Disabled
2. Radio Configuration
→
Secure
→
Secure Configuration
→
Advanced
NOTE: These fields will be active only if the “Secure Hardware Equipped” field is enabled in the Radio
Configuration
→
Secure
→
Secure Configuration
→
General section.
- Tx Clear Alert Tones Disabled
- Periodic Keyfail Alert Tone Disabled