DF 2 Manual

[DougH]

Hello,

Would be grateful for a copy of the manual / instructions for a DF 2
M001 or the connector/pin details for input DB9 socket - audio in and
AGC in.

Unit I have has RSSI led disply at max with no input - is this normal
with no connections?

Thank you,
D

[Nick B.]

This is the only one we have in the archive:

http://sites.google.com/site/datongarchive2/dopplerdf2

HTH
Nick.

[Brian Bartlett]

G'day Doug,

I have 2 Datong DF2 units with the full service manual. I'll see if I can scan in the relevant page for you.

Pin 1 Common Gnd
Pin 2 NC
Pin 3 NC
Pin 4 NC
Pin 5 NC
Pin 6 Audi I/P to audio monitor ch
Pin 7 Audio I/P to DF ch
Pin 8 Loudspeaker O/P
Pin 9 I/P to sig strength indicator

The RSSI, relative range display in the manual, requires 0 - 4V from the AGC and trimmers H and L on the rear panel set the upper and lowerv limits respectively.

I have one with the remote head as well and all are in working order connected to AOR3000 receivers.

Cheers

Brian

Australia

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[Brian Bartlett]

No problem Doug,

I have attached a scan of the DF2 operation manual to hopefully help things along.

Cheers

Brian

On Wed, Nov 9, 2011 at 9:54 PM, DougH <specia...@ntlworld.com> wrote:

Excellent, I'll probably work with two RXs, the Air 7 and the in car mobile 8900 quad band for signal level. Not checked the R8500, info appreciated.

Many thanks and take care out there.

Best regards,
Doug

On 09/11/2011 10:35:36, Brian Bartlett (radioc...@gmail.com) wrote:

G'day Doug,

The RSSI is actually 2.7V max but if I remember correctly the AGC out on
the R8500 is inverted ie 0V is max sig and 2.5V is min sig so stick with
the AOR.

Actually I never bothered with the RSSI connection but it is there to use
if you want. I just used the S meter in the radio as my sig strength
indicator.

As for spacing I used about 150mm which worked fine down to 115Mhz and up
to 600 MHz. All I did was change the antenna whips to the appropriate
length for VHF or UHF as necessary. They are very forgiving units and work
over a broad range. 500mm whips should work fine for 145MHz.

Hope that helps.

Regards

Brian


On Wed, Nov 9, 2011 at 7:58 PM, DougH <specia...@ntlworld.com> wrote:

> **

> Hello Brian,
>
> Thank you for replying and the information. Never know who is reading
> these things so replying off list as some detail may be a give away.
>
> Have managed to figure out the audio side but not RSSI. Only have a > small
> section of the manual as posted on the list site.
>
> Will be more than happy with anything which will let me set up the > signal
> strength side of things. I too have a 3000 with the AGC mod (I think > long
> time ago) as have it hooked to another device which uses it. Also have > an
> IC-R8500 which could be used for a fixed system. Initially will be using > a
> Sony Air 7 for mobile, audio only.
>
> What frequencies have you used the unit on. My primary is 2 meters 145
> MHz. Reason for asking is to try to get a reasonable antenna spacing but > in
> as small a footprint as practicable. Info I have states 0.05 to 0.25
> wavelength diagonals. At frequency of interest gives 100mm which