RFspace NetSDR Bedienungsanleitung PDF herunterladen (Seite 19)

[09][00] [22][00] [02] [78][56][34]12]

The Target responds with:

[09][00] [22][00] [02] [78][56][34]12]

4.2.5 Receiver A/D Amplitude Scale

Purpose: Controls the NetSDR A/D Scaling value when dual channels are used.

Control Item Code: 0x0023

Control Item Parameter Format:

The first parameter is a 1 byte channel ID.

Selects which channel to set or set all the same Scale value(0xFF)

Channel 1 ID == 0x00

Channel 2 ID == 0x02

Followed by a 2 byte 16 bit 2's compliment scaling value. (16 bit unsigned integer LSB first)

Use 0xFFFF for maximum scaling(default).

Example, To set The NetSDR Channel 2 A/D amplitude scale to .5 (0x4000 2's compliment)

The host sends this:

[07][00] [23][00] [02] [00][40]

The Target responds with:

[07][00] [23][00] [02] [00][40]

4.2.6 RF Gain

Purpose: Controls the Level of RF gain( or attenuation) of the receiver.

Control Item Code: 0x0038

Control Item Parameter Format:

The first parameter is a 1 byte channel ID.

Selects which channel to set or set all the same RF Gain(0xFF)

Channel 1 ID == 0x00

Channel 2 ID == 0x02

Parameter 2 is a 1 byte signed value whose value may be (0 , -10, -20-, -30 dB).

In Hex notation these values are ( 0x00, 0xF6, 0xEC, 0xE2).

Example, to set the receiver channel 1 RF Gain to -20 dB (-20 is 0xEC).

The host sends this:

[06][00] [38][00] [00] [EC]

The Target responds with:

[06][00] [38][00] [00] [EC]

The host sends this to request the current RF Gain setting for channel 1:

[05][20] [38][00] [00]

The Target responds with:

[06][00] [38][00] [00] [EC]

Rev. 1.03 2011-11-01

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RFspace NetSDR Bedienungsanleitung Seite 19