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3.
4.
(1). A= A (Active)
(2). BB.B= Desired Net
(3). CC = 00 basic HAVE QUICK A & B NETS.
5.
6.
= 25 for NATO-Europe
= 50 for non-NATO Europe 7.
= 75 for future use.
8.
b. Training Nets (T-NETS). Each Major Command
is assigned a training WOD for daily training and radio
maintenance. Training WODs may be loaded using a
single WOD or MWOD methods. All training WODs are
initialized with 300.0XX in channel 20. XX sets the frsquency
hop rate for the WOD in a SWOD only. In this
training mode, the radio hops between the five frequencies
loaded in with the WOD (locations 19 to 15) and
five training nets are available. As shown below, a net
number ending in 00 selects a training net.
Repeat steps 6 through 8 until all frequencies are
loaded.
(1). A00.000
(2). A00.100
9. Frequency Switches - Set to 220.000 MHz
when all frequencies have been loaded.
10. CHAN Switch - Set to Channel 20.
11. Function Selector Switch - PRESET.
12. LOAD Button - Lift preset frequency label
cover and push LOAD button.
Loading or Changing FMT NETS.
CHAN Switch - Set to Channel 20.
Function Selector Switch - PRESET.
Frequency Switches - Set to 220.075.
LOAD Button - Lift preset frequency label
cover and push LOAD button. Listen for a
single beep.
Function Selector Switch - MNL.
CHAN Switch - Set to appropriate memory
location (Channels 20 to 5).
Frequency Switches - Set to select first frequency.
T-TONE Switch - Toggle to TONE and release.
Change 4 3-19
TM 1-1520-238-10
3.8 VOICE SECURITY SYSTEM TSEC/KY-58. NOTE
The TSEC/KY-58 (RCU), located in the right console,
interfaces with the AN/ARC-186 and AN/ARC-201 radios
to provide secure voice (ciphony) for these radios.
The TSEC/KY-58 receives 28 vdc from the 28 vdc emergency
bus through the KY-28 circuit breaker on the pilot
overhead circuit breaker panel.
Two operating modes are available: PLAIN mode for inthe-
clear voice transmission or reception, and C/RAD 1
(cipher) mode for secure radio transmission or reception.
The RCU POWER switch must be set to
ON and the KY-28 circuit breaker must be
IN before AN/ARC-136 or AN/ARC-201
radio communication (plain or ciphered) is
possible.
3.8.1 Controls and Functions. Voice security system
controls that require adjustment by the pilot include
those on the Z-AHQ Power Interface Adapter, TSEC/
KY-58 (located in the aft avionics bay), and the Z-AHP
KY-58 RCU (located in the pilot right-hand console).
Each of these devices are shown in figure 3-6. The function
of each control and indicator is described in tables
3-5 through 3-7.
Table 3-5. Z-AHQ Power Interface Adapter Control and Indicator Functions
Control or Indicator Function
BBV, DPV, BBN,
DPN 4-position
switch
PTT button
(push-to-talk)
FILTER IN/OUT
Selector
REM/LOC Switch
Set according to type of radio being secured. Set to BBV for pilots VHF FM radio.
Clears crypto alarm that occurs upon power up. Alarm can also be cleared by pressing
any push-to-talk switch in the pilot compartment.
Prevents adjacent channel interference when using radios with channel spacing of 25
kHz. Must be set to IN for pilots AN/ARC-186(V) VHF-FM radio.
Sets the Z-AHQ to the local mode. Switch returns to REM (remote) position upon release,
but equipment remains in local mode until any PTT is keyed.
3-20
TM 1-1520-238-10
Table 3-6. Z-AHP Remote Control Unit Control and Indicator Functions
Control or Indicator Function
ZEROIZE switch Use in an emergency to delete all crypto-net variables (CNVs) from KY-58 registers.
(two-position toggle Renders KY-58 unusable until new variables are loaded.
switch housed
under a
spring-loaded
cover)
DELAY switch Not used.
C/RAD 1/PLAIN Set switch to C/RAD 1 (cipher radio 1) to use secure voice. Set switch to PLAIN when
Switch operating radio in the clear.
Switch guard Rotate to the left to prevent C/RAD1/PLAIN switch from accidentally being set to
PLAIN.
MODE Switch Set to OP (operate) to use pilots VHF radio in either the Ciphered or Plain mode. Set to
LD (load) when installing (CNV) in the TSEC/KY-58 (TM 11-5810-262-12&P). Set to RV
(receive variable) during manual remote keying (TM 11-5810-262-12&P).
POWER switch Turns KY-58 on and off. Must be on (up) for operation in either plain or cipher mode.
FILL switch Selects desired (CNV).
Table 3-7. TSEC/KY-58 Control and Indicator Functions
Control or Indicator Function
VOLUME control Sets audio level of pilots VHF-FM radio.
　
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