ZETRON 37-MAX, Installation Manual

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Section 4. Programming
4-9
This test is used to set the receive audio level and frequency response to produce a flat, unity-
gain output from the repeater during normal operations. When this command is entered, the
37-MAX will key the transmitter, open the repeat audio path, and then remain that way until
the test is terminated. The technician will then transmit a signal of known level to the
repeater and adjust the receive level and de-emphasis jumpers until a unity gain output is
achieved on the transmitter. The test is terminated by sending a “#” to the panel.
394# Repeat Audio Test
CTCSS Encode Test
This test is used to set the encode deviation level for the CTCSS/DCS encode. When this
command is used, the panel will key the transmitter and encode a 136.5 Hz CTCSS tone. The
technician should adjust the encode level for 15% of full channel deviation (e.g. for 750 Hz
deviation on a channel licensed for 5 kHz maximum deviation). The test is terminated by
sending a “#” to the panel.
395# CTCSS Encode Test
CTCSS Frequency Response Test
This test is used to determine how flat the encode deviation level is across the entire range of
CTCSS tone frequencies. A reasonably flat output level is necessary for reliable operation of
the decoders in the mobiles on the system. When this command is used, the 37-MAX will
key the transmitter and start encoding a CTCSS tone. Every time a DTMF digit is received,
the panel will switch to encoding the next DTMF tone in the list (67.0 Hz, 136.5 Hz, 250.3
Hz). The test is terminated by sending a “#” to the panel.
396# CTCSS Frequency Response Test
DCS Encode Test
This test is used to verify the correct polarity and deviation level for the DCS encode. When
this command is used, the panel will key the transmitter and encode DCS code "023". If the
code "047" is decoded on your service monitor, then the DCS Polarity must be changed using
the command 216# or 215#. The test is terminated by sending a "#" to the panel.
397# DCS Encode Test
Exit the Program Mode
Returns the Model 37-MAX to the normal operating mode.
99# Exit Program Mode