Anritsu S113C Guía de usuario descargar pdf (Pagina 5)

7. INSTACAL MODULE VERIFICATION

This test verifies the performance of the Anritsu Site

Master InstaCal Calibration Module. The InstaCal

Module, part number ICN50, is an optional acces

-

sory for the S113C, S331C, and S115BQ.

NOTE

Full verification of the InstaCal module over

its entire frequency range (2 - 4000 MHz) re

-

quires both an S113C (or S115BQ) and an

S331C Site Master. However, limited verifica

-

tion is possible with either instrument for the

frequency range of that instrument only. The

frequency range of the S113C and S115BQ is 2

to 1600 MHz. The frequency range of the

S331C is 25 to 4000 MHz.

a. Equipment Required:

·

InstaCal Module, part number ICN50

· 20 dB offset, Anritsu SC5270

· 6 dB offset, Anritsu SC5237

b. Procedure

NOTE

If performing full verification over the entire

frequency range with both an S113C (or

S115BQ) and an S331C Site Master, perform

this procedure first on the S113C (or S115BQ)

and then on the S331C.

1. Press and hold the

ESCAPE/CLEAR key,

then press the

ON/OFF key to turn on the

Site Master. (This sets the instrument to

the factory preset state.)

NOTE

Before continuing, allow a five minute warm

up for the internal circuitry to stabilize.

2. Press the

MODE soft key.

3. Use the Up/Down Arrow key to highlight

RETURN LOSS, then press ENTER.

4. Press the

START CAL key. The message

“CONNECT OPEN or InstaCal TO RF

Out PORT” will appear in the display.

5. Connect the InstaCal module to the RF

Out port and press the

ENTER key.

NOTE

If this particular InstaCal module has been

used to calibrate this Site Master before, the

Site Master senses the familiar InstaCal mod

-

ule and automatically calibrates the unit us

-

ing the OSL procedure.

If the Site Master senses that the character

-

ization data for the InstaCal module connected

to this Site Master is different than the one

currently stored, it will display soft key op

-

tions to keep or replace the InstaCal charac

-

terization data.

Selecting the

YES soft key transfers all of the

characterization data from this InstaCal mod

-

ule to the Site Master. The transfer may take

up to three minutes. This option is preferred if

this InstaCal module is to stay with this par

-

ticular Site Master. Once completed, the data

will not need to be transfered again for this

combination of Site Master and InstaCal mod-

ule.

Selecting the

NO soft key will temporarily

transfer only the portion of the characteriza-

tion data necessary for this particular calibra-

tion. This transfer takes aproximately 30 to 60

seconds, and will have to be repeated every

time a calibration is done using this combina-

tion of Site Master and InstaCal module.

6. Verify that the calibration has been prop

-

erly performed by checking that the

CAL

ON!

message is displayed in the upper

left corner of the display.

7. Remove the InstaCal module from the

RF Out port and connect the 20 dB Off

-

set to the RF Out port.

8. Measure the return loss of the 20 dB Off

-

set. The level should be 20 dB, ±2dB

across the calibrated frequency range.

9. Remove the 20 dB Offset from the RF

Out port and connect the 6 dB Offset to

the RF Out port.

10. Measure the return loss of the 6 dB Off

-

set. The level should be 6 dB, ±1.2 dB

across the calibrated frequency range.

Site Master S113C/S331C/S115BQ MM 5

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