# Power supply range for FastTrack Supreme 10/15

**URL:** https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223
**Category:** General wireless topics
**Created:** [February 22, 2010, 6:14pm UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223 "2010-02-22T18:14:36Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![mlsalcedo](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@mlsalcedo](https://forum.sierrawireless.com/u/mlsalcedo)
#### Post date: [February 22, 2010, 6:14pm UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223/1 "2010-02-22T18:14:36Z")

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Hi,

I have a demo modem based in Wismo Quik Q2403A board, Its seems to be an FastTrack Supreme 10 or 15, with RS-232 serial port.

I wish to know the input power supply range for this modem, in order to build our own.

BWT, The module have no internal batteries.

Any comments will be appreciated.

Thanks in advance.

 ![](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/e/e04a23dac0a3321b1eed1495b61a5407fca25567.JPG)  

 ![](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/2/21910073a0c1c80a89f3d6b57bdc51fedae0b1ac.JPG)  

 ![](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/c/cfa6821411fa12c332e2cfe3446e7c1616c46542.JPG)

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### Author: ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)
#### Post date: [February 22, 2010, 8:22pm UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223/2 "2010-02-22T20:22:36Z")

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> [@mlsalcedo](#):
>
> I wish to know the input power supply range for this modem

It is clearly stated in the User Guide!

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### Author: ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)
#### Post date: [February 22, 2010, 8:27pm UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223/3 "2010-02-22T20:27:18Z")

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> [@mlsalcedo](#):
>
> I have a demo modem based in Wismo Quik Q2403A board, Its seems to be an FastTrack Supreme 10 or 15

No, that’s not a Supreme - that’s based on a Q26 (see the User Guide, again).

It’s not even the Supreme’s predecessor - the M1306 (which was in the same sized can).

It is even older than that - it is the M1306’s predecessor (which had a can about 50% longer than the Supreme and M1306)

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### Author: ![wavecomhuy](https://avatars.discourse-cdn.com/v4/letter/w/bc8723/32.png) [@wavecomhuy](https://forum.sierrawireless.com/u/wavecomhuy)
#### Post date: [March 4, 2010, 9:34am UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223/4 "2010-03-04T09:34:28Z")

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usually, the input power about is 8V to 15V, tell you a method, see the PCB if have the inductance, if have ,is the DC/DC power, the input power is high, about 8V to 15V, if without, is the LDO power, is input power is low, about 5V to 8V.

the product isn’t supreme product.

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### Author: ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)
#### Post date: [March 4, 2010, 4:04pm UTC](https://forum.sierrawireless.com/t/power-supply-range-for-fasttrack-supreme-10-15/4223/5 "2010-03-04T16:04:40Z")

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> [@sierrahuy](#):
>
> usually, the input power about is 8V to 15V

What do you mean by “usually”?  
What do you mean by “about”?

> [@](#):
>
> see the PCB if have the inductance, if have ,is the DC/DC power

No, that is not a safe deduction - inductors may be used purely for filtering, and for many other purposes unrelated to DC/DC converters!

> [@](#):
>
> the input power is high, about 8V to 15V

Again, that is not a safe deduction.

> [@](#):
>
> if without, is the LDO power

Why specifically “LDO”?

> [@](#):
>
> is input power is low, about 5V to 8V.

Again, that is not a safe deduction.

Don’t guess these things - confirm them in the manual!