Table of Contents
Advertisement
nels display a pair of frequencies for each channel
number, one for generate and one for monitor. Identify
generate or monitor frequencies by the letters RX or
TX.
The system changes automatically from transmit to
receive frequencies with the Generate/Monitor switch
or the MIC push-to-talk switch. Each simplex channel
and
each generate frequency of a duplex channel has
either a PL or DPL code. A dash replaces an unused
code. When
a
preset is selected, the appropriate PL or
DPL code is also programmed into the signaling
generator.
• ENTRY WITH MEMORY TABLE
To enter a frequency or code into the memory table,
proceed as follows:
1.
Select RF Memory DISPLAY position.
2.
Use the keypad cursor keys to select the line and lo-
cation to be changed.
3. Use the keypad numeric keys to enter the new fre-
quency, PL, or DPL code.
4. Make other changes or corrections for each line of
the memory table.
5. Turn the POWER switch to Standby for five sec-
onds. Turn the switch On and check the memory table
to verify that all information is correct.
• ENTRY WITHOUT MEMORY TABLE
To enter a frequency or code without using the memory
table, proceed as follows:
1. Select Gen/Mon/Mtr DISPLAY position.
2. Use the keypad cursor keys to locate the cursor over
the first digit in the frequency.
3. Use the numeric keys to enter a new frequency. The
new frequency displays automatically when the power is
turned on.
4. If a frequency is selected from the memory table,
after a new frequency was entered directly, the frequen-
cy from the memory table takes precedence and it will
appear when the Analyzer is turned off and one again.
5. To change or add PL or DPL codes in the generate
mode, use the same procedure but move the cursor to
the second line.
• PRESET TURN-ON
The Analyzer's normal internal configuration turns-on
at Gen/Mon Mtr, FM, and PLiDPL. To program the
system to turn-on at any other configuration, proceed as
follows:
1. Press an arrow key to select the desired DISPLAY.
2. Press an arrow key to select the desired FUNCTION.
3. Press a MODULATION key to select the desired
Code Synthesizer Mode.
4. Simultaneously depress both keypad cursor keys to
obtain the special function display. Enter code number
3-11
71 to enter the new configuration into the nonvolatile
memory.
5. Turn the POWER switch off and then on again.
Check the display's accuracy.
6. To restore the system to normal turn-on configura-
tion, follow steps
1
through
4
above.
• SIGNALING SEQUENCE
The complete signaling simulator in the system includes
both encode and decode tone sequence synthesizer
capability for the following MODULATION modes:
Fixed
1
KHz tone
Single tone variable
Private Line (PL)
Tone A or Tone B
Digital Private Line (DPL) sub-audible squelch
Two-tone sequential paging
5/6 tone paging
Select V signaling
General sequential, ten-tone
Mobile telephone signaling
(lMTS) improved mobile telephone system
(MTS) mobile telephone system
2805 Hz
Tone Remote, base station
SIGNALING SEQUENCE MODE SEL) 0
ENTER 0 FOR MENU
1) A/B ENCODE
2) 5/6 TN ENCODE/DECODE
3) SELECT V ENCODE/DECODE
4) PL DECODE
5) DPL DECODE
6) GENERAL SEQ ENCODE/DECODE
7) MOBILE TELEPHONE
MON/GEN SW FOR DECODE/ENCODE
FIGURE 3-2l.
SIGNALING SEQUENCE MENU DISPLAY
• SIGNALING SEQUENCE MENU
Figure 3-21 defines the Signaling Sequence menu for
page 0 showing the set of seven sub-displays or pages,
one for each family of encode and decode tone se-
quences. During the menu display no sequence output is
possible. To select a page, place the cursor over 0 on line
I and enter a number from I to 7. The system generates
the selected family's sequence.
.
NOTE:
The sensitivity of the decode circuits is controlled by the
OSCILLOSCOPE Vert switch and vernier. For best
results, set the control for a 90% of full-screen deflec-
tion in the oscilloscope mode. Too little signal causes a
NO INPUT SIGNAL indication on the screen; too high
causes wandering or erroneous readings.
Hide quick links:
Advertisement
Table of Contents
