
125FT-857 Operating Manual
APPENDIX
MH-59A8J REMOTE MICROPHONE
The optional MH-59A8J Remote Microphone provides control of the major functions of the
FT-857 from the microphone’s keypad. The MH-59A8J includes a rotary control knob for
adjust the operating frequency and receiver audio volume level.
Before connecting the MH-59A8J, you must instruct the FT-857’s microprocessor that the
MH-59A8J is being used, using the Menu Mode:
1. Press and hold in the
[
FUNC
]
key for one second to activate the Menu Mode.
2. Rotate the SELECT knob to recall Menu Mode No-001
[
EXT MENU
]
, then rotate the
DIAL to change the setting to “ON” to enable the extended Menu Mode.
3. Rotate the SELECT knob to recall Menu Mode No-059
[
MIC SEL
]
. The default setting
for this Menu is “NOR.” Rotate the DIAL to change the setting to “RMT.”
4. Press and hold in the
[
FUNC
]
key for one second to save the new setting and exit to
normal operation.
MH-59A8J Switches and Control
LOCK Switch
Pressing this key locks the FT-857’s front panel keys
so as to prevent accidental frequency change.
PTT Switch
Press this switch to transmit, and release it to receive.
Keypad
[
1
(
DSP
)]
key
Pressing this key provides instant access to Multi Function
Row “p” (MFp), which contains the command keys for the
receiver’s Digital Signal Processing System (requires optional
DSP-2 Unit).
This key generates the DTMF “1” tone during transmission, and
frequency entry digit “1” during Direct Keypad Frequency Entry.
[
2
(
MHz
)]
key
Pressing this key allows tuning in 1-MHz steps of the VFO frequency.
This key generates the DTMF “2” tone during transmission, and frequency entry
digit “2” during Direct Keypad Frequency Entry.
[
3
(
CLAR
)]
key
Pressing this key momentarily activates the Receiver Clarifier (“R.I.T.”) feature.
Press and hold in this key for one second to activate the IF Shift feature.
This key generates the DTMF “3” tone during transmission, and frequency entry
digit “3” during Direct Keypad Frequency Entry.
P
1
7
1
4
8
2
0
5
9
3
6
A
C
C
MH-59