D&R Memo Airmate-Telco User manual

R e s e a r c h & D e v e l o p m e n t
D&R Electronica Weesp B.V.
Rijnkade 15B
1382GS Weesp, The
Netherlands
Phone: [phone]
Fax: [phone]
Website: http://www.d-r.nl
Production: Airmate-Telco
Airmate-Telco Relay Voltage.Docx
7-3-2013 Jaac van der
[email protected]
Pagina 1 van 1
Modification to correct for varying coil voltage to relay RL2.
1. Replace the following components during assembly of the PCB.
Part
Old Part
Old Part Number
New Part
New Part number
R6
1K8
10350732
1K5
10350731
Z6
8V2 Zener
10250352
9V1 Zener
10250373
The components are marked with a red cirkel

R e s e a r c h & D e v e l o p m e n t
D&R Electronica Weesp B.V.
Rijnkade 15B
1382GS Weesp, The
Netherlands
Phone: [phone]
Fax: [phone]
Website: http://www.d-r.nl
Production: Airmate-USB TELCO MODULE
Airmate-USB TELCO MEMO Mix Minus
Adjustment.Docx
17-1-2013 Duco de Rijk
Pagina 1 van 1
Adjustment of Mix-Minus trimmers by end user/engineer in Airmate-USB Telco channel
Enduser on location
1. Connect a signal (Music or 1kHz tone) to the line input of the TELCO module.
(no other signal anywhere else in the mixer should be fed to the mixer)
2. Select the Line input in the Telco module.
3. Now call the station with your mobile phone.
4. Pick up your own call on the mixer.
5. Listen to your mobile phone and you will hear the signal from the line in of the Telco module
pretty low (hopefully)
6. Adjust trimmer VR2 (L) to a minimal heard signal in your mobile phone and do the same
with trimmer VR3(R)
Engineer
1. Connect 1kHz L/R on line-in of the Telco line in module.
2. Put an oscilloscope on test point J3
3. Adjust VR2/3 for minimal signal
R7>
<R68/R30
J3

R e s e a r c h & D e v e l o p m e n t
D&R Electronica Weesp B.V.
Rijnkade 15B
1382GS Weesp, The
Netherlands
Phone: [phone]
Fax: [phone]
Website: http://www.d-r.nl
Production: Airmate-USB TELCO MODULE
Airmate-USB TELCO MEMO NOISE.Docx
17-1-2013 Duco de Rijk
Pagina 1 van 1
Improvement of gain range for incoming Phone calls in Airmate-USB Telco channel
----------------------------------------------------------------------------------------------------------
Improvement of gain range of Telco send potentiometer.
1. Replace R68 (1M) by 10K
2. Replace R30 (4K7) by 10K
<R68/R30

R e s e a r c h & D e v e l o p m e n t
D&R Electronica Weesp B.V.
Rijnkade 15B
1382GS Weesp, The
Netherlands
Phone: [phone]
Fax: [phone]
Website: http://www.d-r.nl
Production: Airmate-USB/Triple input module/Telco module
Airmate-USB_Triple Input_Telco_MEMO
(Second Start Pulse Removal).Docx
17-1-2013 Jaac van der Linden
Pagina 1 van 2
Mixer: Airmate USB
Modules involved: Airmate1e
Airmate1usb_c
Airmate1telco_c
Problem: The fader start gives a secondary pulse when the fader start is activated
while the on/off button is in off position.
Cause: C47 (TIM/USB) And C9 (Telco module) isn’t discharged quick enough.
Background: C47 is placed to reduce the on/off click.
Solution: Place a 18K resistor from the negative side of C47 to –VS1 to discharge
the capacitor quick enough.
Also change R60 from 390K to 220K to make sure that the MIC on/Self op
transistor is turned on properly.
Changes in the BOM:
Airmate1e: R60 390K -> 220K
Airmate1usb_c: R60 390K -> 220K
Airmate1telco_c: none
Modification for production:
Airmate1e: Add a 18K resistor as shown
Add a 18 kOhm
resistor between
shown points on
the left

R e s e a r c h & D e v e l o p m e n t
D&R Electronica Weesp B.V.
Rijnkade 15B
1382GS Weesp, The
Netherlands
Phone: [phone]
Fax: [phone]
Website: http://www.d-r.nl
Production: Airmate-USB/Triple input module/Telco module
Airmate-USB_Triple Input_Telco_MEMO
(Second Start Pulse Removal).Docx
17-1-2013 Jaac van der Linden
Pagina 2 van 2
Airmate1usb_c: Add a 18K resistor as shown
Airmate1telco_c: Add a 18K resistor as shown
Add a 18 kOhm
resistor between
shown points on
the left