RXMT Procedures

11-5820-890-10-8

RXMT Procedures

4.9c.

In that the illustrative situation makes RADIO-A an NCS, RADIO-C will

NCS DESIGNATIONS

always operate in the FH position. Because RADIO-B is an outstation

in RADIO-A's net, RADIO-B also operates in the FH mode.

RADIO-D (an RXMT radio) operates in the FH - M position and serves

as NCS for the two station net consisting of RADIO-B and RADIO-D.

OTAR and Broadcast transmissions WiII pass through an RXMT

ELECTRONIC UPDATES

installation, but ERF data WiII not. If it is necessary to send net FH data

to RADIO-B electronically, break the RXMT link, send the ERF to

RADIO-D using one of the net IDS or SC frequencies. RADIO-D then

sends the ERF to RADIO-B using the second net ID or SC frequency.

NOTE

RXMT MODE: When ASIP radios are used at the RXMT site and are temporarily taken out of the

RXMT mode, the RXMT cable must be disconnected until the radios are placed back into a RXMT

mode.

DATA RXMT: All data rates except PCKT may be retrans with the following provisions.

1, SDM data, TF and AD1 : No change to normal retrans procedures. Radios do not have to be set

in Data mode (data off). Mixed radios at RXMT site or outstations is permitted.

2. EDM DATA: Radios at the RXMT site have to be set to the same EDM data rates as outstations.

Only SlP/ASlP radios can be used at the RXMT site and outstations.

If using SINCGARS versions RT-1523A/B/C/D/E, either PT or CT

COMSEC SETTINGS

COMSEC setting may be used as desired. With a RT-1523 RXMT

station FH-SC, only the RT in "SC" must be in PT. These requirements

in no way preclude the use of CT communications between RADIO-A

and RADIO-B. When the RXMT station must be in PT it will be

necessary for RADIO-A or RADIO-B to change to PT if contact with

the RXMT team is desired.

Procedures for establishing RXMT communications between

FH TO FH PROCEDURE

RADIO-A and RADIO-B are as shown in Figure 4-20, below:

NCS recognizes contact with RADIO-B is lost or

(1)

soon will be; alerts RXMT crew for mission.

RXMT crew loads radios with proper FH data,

(2)

Including RXMT net ID.

RXMT crew moves to RXMT location, sets up

(3)

OE-254 antennas, establishes RADIO-C to

RADIO-D to

RADIO-B

RADIO-A

and

communications.

When ready, installs an RXMT cable between

(4)

RADIO-C and RADIO-D; sets RADIO-C and

RADIO-D to RXMT sets RADIO-D to FH-M and

RADIO-C to FH; and sets COMSEC of both radios

to CT for monitoring.

RXMT communications between RADIO-A and

(5)

RADIO-B are now established.

Figure 4-20. FH NET TO FH NET RXMT

4-30