Lectrosonics UDR195 - Manual (Page 15)

Wireless Diversity Receiver
AUDIO SIGNAL QUALITY
Poor signal to noise ratio
Transmitter gain set too low
Noise may not be in wireless system. Mute the audio signal at the transmitter and see if noise remains. If the noise
remains, then turn the power off at the transmitter and see if it remains. If the noise is still present, then the problem
is not in the transmitter.
If noise is still present when the transmitter is turned off, try lowering the audio output level on the DR195 rear
panel and see if the noise lowers correspondingly. If the noise remains, the problem is not in the receiver.
Receiver output does not match the input of the device it is feeding. Try increasing the output level of the DR195
and lowering the input gain on the device the DR195 is feeding.
Distortion
Transmitter input gain too high. Check and/or re-adjust input gain on transmitter according to the LEDs on the
transmitter and then verify the setting with the transmitter audio level LED strip on the DR195 front panel.
Audio output level too high for the device the DR195 is feeding.
Compressed dynamic range
VU METERING AND OUTPUT LEVEL
The TRANSMITTER AUDIO LEVEL LED strip provides an expanded scale range and virtually an instantaneous response to
brief transients in the signal. The VU meter range is much more limited, and slower responding to brief transients.
VU meter barely moves, even when the AUDIO LEVEL LED strip shows full modulation
Depending upon the nature of the dynamics in the audio signal passing through the system, you may need to
increase the sensitivity on the VU meter. Adjust the VU meter sensitivity with the rear panel VU METER HEAD­
ROOM control on the rear panel so that the LED strip and VU meter appear to track signal peaks about the same.
VU meter indicates a higher level than the AUDIO LEVEL LED strip.
The VU METER HEADROOM control may be set too high for the dynamics of the audio signal.
NOTE: When adjusting the VU METER HEADROOM control to increase the VU meter readings, it may be desirable to also
adjust the AUDIO OUTPUT control to compensate for the added sensitivity of the VU meter. Both controls are calibrated in 5
dB steps. Increase the AUDIO OUTPUT by the same amount as is set on the VU METER HEADROOM control to insure that
the desired output level will be present at 0 on the VU meter.
DR195 REPLACEMENT PARTS and ACCESSORIES
Part No. Description
A-185 Coax Remote, coaxial folded dipole VHF antenna; BNC connector
A-185-BNC Telescoping 1/4 wave VHF/UHF whip; BNC connector.
A-200 Remote dipole UHF/VHF antenna with aluminum mounting block; supplied with one
built-in telescoping whip and one detachable telescoping whip. Operates on VHF or UHF
frequencies.
A-9775 Coaxial extension cable for A-200 dipole antenna; BNC male/male connectors, 10 ft,
RG-58 cable.
21475 Replacement power cord
22090 Replacement fuse, GDC, 315ma, 250V
22091 Replacement fuse, GDC, 160mA, 250V
Rio Rancho, NM – USA 15