Rear Accessory Change

[slapshot0017]

Hello all,
Does anyone know how to turn the rear NX-700 DB25 accessory port connector into the primary mic connection that will work for a 16 key dtmf mic? Any help would be extremely appreciated!
Thank you!

 

[buddrousa]

What type radio?

 

[slapshot0017]

Ha duh! The NX-700. Sorry bit of a mind lapse there

 

[kd4efm]

What is the goal your trying to accomplish here? Why not just make up a cat5 cable to plug into the front
unless your trying to setup a dual dispatch position then you configure the options under EXTENDED FUNCTIONS.

Trying to picture what your doing here, but really your asking for something to go wrong a little quicker than your willing to take on. just my opinion.

EFM

 

[slapshot0017]

What is the goal your trying to accomplish here? Why not just make up a cat5 cable to plug into the front
unless your trying to setup a dual dispatch position then you configure the options under EXTENDED FUNCTIONS.

Trying to picture what your doing here, but really your asking for something to go wrong a little quicker than your willing to take on. just my opinion.

EFM

I'm just trying to make the rear accessory connector a mic port. It's not in use and it keeps my dash clear of wires.

I have a general gist of what to do I just want to know if anyone else has done it that can give some guidance. The only issue is how to setup up the pins and kpg. Honestly if anyone could just explain what each pin does and if any of them relate to kpg I can figure it out myself.

 

[kd4efm]

I'm just trying to make the rear accessory connector a mic port. It's not in use and it keeps my dash clear of wires.

I have a general gist of what to do I just want to know if anyone else has done it that can give some guidance. The only issue is how to setup up the pins and kpg. Honestly if anyone could just explain what each pin does and if any of them relate to kpg I can figure it out myself.

The 25-pin D-sub connector is located on the rear panel of the transceiver and external devices, such as a Mobile Data
Terminal, can be connected to this connector.

Table 1-3 Signal Assignments for D-sub 25-pin Connector
Pin No. Signal Name Input/Output Signal Type Specifications Min. Typ. Max. Unit
1 NC - - - - - - -
2 RXD1 Input Digital Input Voltage Range -30 - 30 V Threshold Low 0.5 1.3 - V Threshold High - 1.75 2.6 V Baud Rate - - 19200 bps CL - 100 - pF
3 TXD1 Output Digital
Voltage Swing (3k Load) ±5 ±9 - V
Baud Rate - - 19200 bps
CL - 100 - pF
4 AUXIO9 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
5 DI Input Analog
Input Voltage Range
(STD Deviation) - 0.5 - Vp-p
Frequency Response
(STD Deviation)
20 Hz - 9600 Hz
-3 - 3 dB
6 MI2 Input Analog
Audio Level (STD Deviation) - 5.0 - mVrms
Allowable Frequency 300 - 3000 Hz
Input Impedance - 600 - 
7 GND - GND - - - - -
8 AUXIO8 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
9 TXD2 Output Digital
VOH (Io = -1.5 mA) 3.7 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
CL - 100 - pF
10 RXD2 Input Digital
VIH 2.8 - 5.2 V
VIL - - 0.65 V
CL - 100 - pF
11 GND - GND - - - - -
12 AUXIO7/
BER_DATA Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 3.7 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
13 AUXIO6/
BER_CLK Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 3.7 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
14 SB - Power Voltage This parameter depends on battery
voltage.
Supply Current - - 2.0 A
15 AUXO2 Output Digital
The type of this port is open collector.
VOL - - 0.4 V
IOL - - -500 mA
16 AUXO1 Output Digital
The type of this port is open collector.
VOL - - 0.4 V
IOL - - -500 mA
17 AFO Output Analog
Output Level - 0.7 - Vp-p
Coupling Capacitor - 0.1 - F
Allowable Load 100 - - k
Allowable Frequency 300 - 3000 Hz
18 GND - GND - - - - -
19 DEO Output Analog
Output Level - 0.28 - Vp-p
Coupling Capacitor - 4.7 - F
Allowable Load 47 - - k
Frequency Response (STD Deviation)
Wide: 20 Hz - 4800 Hz -6 - 1 dB
Wide: 4800 Hz -7200Hz -24 - 1 dB
Narrow: 20 Hz - 4800 Hz -15 - 1 dB
20 AUXIO5 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
21 AUXIO4 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
22 AUXIO3 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
23 AUXIO2 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
24 AUXIO1 Input/ Output Digital
VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH (Io = -1.5 mA) 4.0 - 5.2 V
VOL (Io = 1.5 mA) - - 1.1 V
25 ME - Analog This is GND port for microphone

This is the best I can do for you.
Contact your dealer to order: NX-700_800_900_CSI_K_Ver280_EN_20120831.pdf

 

[slapshot0017]

Yea already have that. Looking more for an explanation on their function and purpose.

 

[kd4efm]

Yea already have that. Looking more for an explanation on their function and purpose.

Don't take this wrong please, but if you go into the Extended Functions portion, and select one of
the tabs, then hit F-1 (help) it will tell you what your wanting to know.
Every thing I have done, each one is different, and when using the TP-10 remote base, that's the only
time I have the same settings set for NX-800's.

You can assign any of the pins for PTT and for MIC-2, any answer after this would be valid, as not all will be
the same.

The NX-x20 series is using a DB-15.

Best I can say, as I have not used the back DB-25 for a KMC-26 or 32 DTMF mic.

 

[slapshot0017]

Don't take this wrong please, but if you go into the Extended Functions portion, and select one of
the tabs, then hit F-1 (help) it will tell you what your wanting to know.
Every thing I have done, each one is different, and when using the TP-10 remote base, that's the only
time I have the same settings set for NX-800's.

You can assign any of the pins for PTT and for MIC-2, any answer after this would be valid, as not all will be
the same.

The NX-x20 series is using a DB-15.

Best I can say, as I have not used the back DB-25 for a KMC-26 or 32 DTMF mic.

Hmm interesting I will take a look. Thank you!

 

[slapshot0017]

After some searching, no dice...

 

[wirelesssamurai]

What microphone/connector combination do you want to use?

 

[slapshot0017]

What microphone/connector combination do you want to use?

I am using a db 25 to Ethernet adapter at the rear accessory port with a 16 key dtmf mic.

 

[ramal121]

Have done this. A sheriff office wanted a second mic on their NX-700s mounted on the right side of the dash. The reason is to be able stand outside the patrol vehicle out of traffic and run warrant checks, etc.

You want to use MI2 off of the rear acc connector along with an I/O pin programmed as PTT. Most important the Kenwood mic has two grounds and both need to be wired to the DB-25 for this to work.

If you need more, I can look at my notes after 9/21 when I get home from vacation.

 

[slapshot0017]

Have done this. A sheriff office wanted a second mic on their NX-700s mounted on the right side of the dash. The reason is to be able stand outside the patrol vehicle out of traffic and run warrant checks, etc.

You want to use MI2 off of the rear acc connector along with an I/O pin programmed as PTT. Most important the Kenwood mic has two grounds and both need to be wired to the DB-25 for this to work.

If you need more, I can look at my notes after 9/21 when I get home from vacation.

That would be a huge help! It is a 16 key mic. Any help I will gladly take!

 

[ramal121]

I have found my notes, but re-reading your post you have the 16key mic. My hook up will work with a regular palm mic but I don't think you can get the keypad to work through the rear accessory connector. Do you still need the pin to pin for a regular mic anyway?

 

[slapshot0017]

Yes that will help.

 

[cmdrwill]

Some mics have the DTMF tone generator in them, and they will work thru the external 'rear connector'. You will have to feed 8 volts to one of the mic pins as the 8 volts runs the 'keypad DTMF'.

Other mic 'key pads' work on data lines into the radio, and do not have any tone/DTMF in the mic. Tones, DTMF and other functions are done in the radio.

 

[slapshot0017]

I have an MC-59 mic off of a TM 281A kit. I am just really at a stand still at the moment though because even the PTT isn't working. When I plug everything in all I get is the can't do that beep or when you have a transmit incapable channel the noise it makes when you hit the ptt, if you understand that. I don't know the technical term...

 

[cmdrwill]

Mic needs 8 volts.......

 

[slapshot0017]

Yes I saw what you wrote before... I already have that pin set...