Anritsu S251C Manual do Utilizador descarregar pdf (Página 15)

bit 2 : Bias – T On/Off

bit 3 : High Power On/Off

bit 4 : Not Used

bit 5 : Cal On/Off

bit 6 : Limit Type ( 0 = Single; 1 = multiple)

bit 7 : Unit of measurement (1 = metric, 0 = English)

194) Status Byte 4:

(LSB) bit 0 - 1 : DTF Windowing Mode

bit: 1 0

| |

0 0 - Rectangular (No Windowing)

0 1 - Nominal Side Lobe

1 0 - Low Side Lobe

1 1 - Minimum Side Lobe

bit 2 – 7 : Not Used

195–228) Not Used (34 bytes)

229-1268) Sweep Data (130 points * 8 bytes/point=1040 Bytes)

229-2300) (259 points * 8 bytes/point= 2072 bytes)

229-4364) (517 points * 8 bytes/point= 4136 bytes)

8 bytes for each data point

1. Gamma MSB

2. Gamma

3. Gamma

4. Gamma LSB

5. Phase MSB

6. Phase

7. Phase

8. Phase LSB

note: return loss = - 20000* log(Gamma/1000)

VSWR = (1+Gamma)/(1-Gamma)

insertion loss/gain = - 2000 * log(Gamma/10000000)

Phase compares the reflected to the incident (reference)

For Transmission Mode, Phase will be sent as 0

For invalid sweeps (empty stored sweep locations) : only 11 bytes will return:

1-2) Number of following bytes (9 bytes for invalid sweep recall)

3-4) Model # (unsigned integer, 00h for Site Master)

5-11) Extended Model # (7 bytes in ASCII)

Invalid sweep location : 1 byte

224 (E0) : Parameter error : Invalid sweep location

Notes:

Gamma is in thousandths (of ratio)

Phase is in tenths of degree

Save System Setup - Control Byte #18 (12h)

Description: Saves current system setup parameters to a specific setup store location.

The Site Master saves all parameters described in Query System Status - Control Byte #20 (14h) (except

Serial Port Echo status) to the specified store location. Store location 0 is the run-time setup of the Site

Master. It holds the power-on defaults of the Site Master.

Bytes to Follow: 1 byte

1) Location to save system setup parameters, 0 - 10

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 33 34

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