Z-Series Audio Optimization Guide
Interoperability Now
Page 9 of 10
Z-Series Audio Optimization Guide
4
Troubleshooting Tips
These troubleshooting tips should resolve some of the most common problems encountered when
setting up a radio interface. If you find that you are still encountering difficulties, please contact
JPS Customer Support by phone at (919) 790-1011 or by email at
4.1
Symptoms: User in Field Complains of Missed First Syllables
▪
Cause: Donor radio is trunked, need to compensate for Channel Acquisition Delay.
▪
Cause: Slow-to-key transmitter on donor radio.
▪
Cause: Secure donor radio, need to compensate for encryption or scrambling.
✓
Solution: Increase
Transmit (TX) Audio Delay
in the donor radio’s Radio Channel on the
Z-Series device.
4.2
Symptoms: User in Field Complains of Missed Syllables Mid-Conversation
▪
Cause: Dropout from Radio Channel using VOX or VMR COR Detection Type.
✓
Solution: Increase
VOX
or
VMR Hangtime
of the Radio Channel supporting the donor
radio.
✓
Solution: Verify the Receive Audio Level is correct. Make
VOX
more sensitive for the
Radio Channel supporting the donor radio.
4.3
Symptoms: Radio Channel Experiencing Continuous Active COR State
▪
Cause: Donor radio is introducing continuous noise to Radio Channel.
▪
Cause: Donor radio is non-FM type, without the quieting characteristic of a frequency
modulated signal. These are most likely Amplitude Modulated radios, such as commonly
used by aircraft, or HF/single-side band (SSB) radios. They typically lack a Hardware
COR output and high noise level causes VOX to false on the noise.
✓
Solution: Change
COR Detection Type
to VMR.
4.4
Symptoms: Audio Sounds Too Weak
▪
Cause: Received audio level from donor radio (or other device type) is too low; verify
using ACU‑Z1 front panel Signal LED or the RSP-Z2 front panel level indicator.
✓
Solution: Change
Receive (Input) Level
audio setting of the receiving channel until the
corresponding Signal LED (or the first red LED on the level indicator of the RSP-Z2)
flickers with voice peaks of incoming speech.
Note:
The number in the Z-Series device GUI indicates the actual level of audio being
received. If the incoming level is -12dBm, the
Receive (Input) Level
setting of the Radio
Channel should be set to -12dBm. If the channel is not receiving enough audio, the
number in the GUI must be set to a lower number to correspond to the actual input level.
The Z-Series device will then apply additional gain or attenuation per the setting change.
▪
Cause: Transmit audio level delivered to donor radio is too low.
(
Solution on next page.
)
