Service Manual Part 1
+8
3 " 2) )2
• In MTM, functions 10 - 13, 21, channel selection and PTT control of receive/transmit
are all required for MPT1352 testing. Type approval testing requires the channel
increment facility using an external input.
• All test function requests are valid when the radio is in either receive or transmit but
some functions (10, 11, 12, 21, 23 and 24) take effect only when the radio is in the
appropriate mode.
• 10 - 13, 22, 23: When any of the functions which set the modem sending test data are
selected (functions 10 - 12), the microphone audio is automatically muted. When the
microphone audio is unmuted using function 23, the modem transmit is disabled.
When the radio is in receive, the microphone audio is temporarily muted and the
modem transmit is temporarily disabled. This prevents any unwanted TCXO
modulation which may occur on radios with dual point modulation.
These automatically selected states can be overridden until the next transmit to
receive transition. If microphone unmute or modem transmit enable is requested
when the radio is in receive, these functions will not be actioned until the radio is
in transmit.
• 10, 11, 12: The two modem data states selected by functions 10 and 11 are ‘0’ =
1800Hz tone and ‘1’ = 1200Hz tone respectively. Preamble, selected by function 12, is
alternating 1800 and 1200Hz tones at a rate of 1200 baud.
*‘
l-MON
’ & ‘
s-MON
’ indicate a long (>1s) and a short (<1s) press of the
key , respectively.
Special functions:
92. set ‘sticky’ MTM
93. clear ‘sticky’ MTM
94. read serial number
95. read factory model ID
99. get current channel number
-
-
-
-
-
-
-
“94”
“95”
-
-
-
-
-
-
-
-
“94”
“95”
-
-
-
-
-
-
“92”
“93”
“94”
“95”
-
-
-
-
-
-
“92”
“93”
“94”
“95”
-
Radio channel control:
select a channel
T2010:
to
‘*n” chan “*nnn”
T2030:
to
“*nnn” *nnn “*nnn”
T2015:
keys
T2035:
Select
channel
& press
Single character commands:
reset the radio
select programming mode
select auto test mode
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
“^”
“#”
“%”
Radio controls & indicators:
PTT press = select Tx mode
PTT release = select Rx mode
channel increment input
Tx indicator
synth. out of lock indicator
RF signal detected indicator
yes
yes
-
Tx
flash
chan
LED
BUSY
-
-
-
Tx
flash
chan
LED
BUSY
yes
yes
-
Tx
flash
TX &
BUSY
BUSY
-
-
-
-
-
-
yes
yes
pin 10, S14
TX
SVC
GO
-
-
-
-
-
-
yes
yes
ECR
TX
SVC
GO
-
-
-
-
-
-
T2010/T2015 T2020 T203X T2040/T2050
Normal CCTM Normal CCTM Man Auto Man Auto
1
1
4
C1
C4