Anritsu S331D, S332D manual Set SPA Preamp State On/Off/Auto Control Byte #136 88h

Models: S332D S331D

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Check Spectrum Analyzer External Reference – Control Byte #134 (86h)

Description: Checks to see if Spectrum Analyzer external reference is present. If it is, it then checks to see if it is at the correct frequency for PLL locking.

Bytes to Follow: 0 bytes

Site Master Returns: 1 byte

On Success:

1)00h – Reference present and at the correct frequency (PLL functioning)

01h – Reference is not present

02h – Reference is present, but internal PLL and external frequency do not match up.

or

On Error:

1)224 (E0h) Parameter Error – Not in External reference mode 238 (EEh) Time-out Error.

Set SPA Preamp State (On/Off/Auto) – Control Byte #136 (88h)

Description: Sets the state of Spectrum Analyzer preamplifier.

Setting the preamp state to ON or OFF sets the preamp coupling to manual. That is, the preamplifier state is controlled independently of all other parameters.

Setting the preamp state to AUTO couples the preamp state to the reference level and the attenuation. If the attenuation is automatically coupled to the reference level, the preamp will turn on when the reference level is set less than -26 dBm. If the attenuation is manually coupled to the reference level, the preamp will turn on when the value of (attenuation – reference level) >= 51.

Bytes to Follow: 1 byte

1)Mode (00h = Off, 01h = On, 02h = Auto)

Site Master Returns: 1 byte

1)255 (FFh) Operation Complete Byte

224 (E0h) Parameter Error: Invalid state

238 (EEh) Time Out Error

Set Spectrum Analyzer Units – Control Byte #140 (8Ch)

Description: Sets the scale type (logarithmic or linear) and the units.

Linear units can be: 01h = Volts

02h = Watts Logarithmic units can be:

03h = dBm

04h = dBV

05h = dBmV

06h = dB￿V

Bytes to Follow: 2 bytes

1)Scale Type (00h = Linear, 01h = Logarithmic)

2)Units

Site Master Returns: 1 byte

92

Site Master PM

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Anritsu S331D Set SPA Preamp State On/Off/Auto Control Byte #136 88h, Set Spectrum Analyzer Units Control Byte #140 8Ch