User manual

HI/IN/LO Indicates the limit testing results

RMT Multimeter is in remote control mode

AUTO Auto ranging enabled

Max/Min MAX / MIN operation is enabled

ERR Hardware or remote control error detected

SHIFT Accessing shifted keys

2.3 Front Panel Menu Reference

A：MATH MENU

1: HI LIMIT → 2: LO LIMIT → 3: PERC REF → 4: dB REF→ 5: dBm REF

1. HI LIMIT Set the high limit for limit testing.

2. LO LIMIT Set the low limit for limit testing.

3. PERC REF Set the reference value for PERCENT function

4. dB REF Set the dB reference voltage value.

5. dBm REF Set the dBm reference impedance value.

B：TRIGGER MENU

1: TRIG MOD

1. TRIG MOD Select IMMediate, Manual or Bus trigger source mode.

C：SYSTEM MENU

1: BEEP STA → 2: BAUD RAT → 3: TX TERM → 4: RETURN → 5: KEY SONG → 6: REVISION

1. BEEP STA Enable or disable the beeper function

2. BAUD RAT Select the baud rate for USB (virtual COM) or RS232 (Model 5491B only)

operation.

3. TX TERM Set the terminal character for USB (virtual COM) or RS232 (Model 5491B

only) operation, which identifies the end of a command string

4. RETURN Sets whether to enable Echo of the “sent” SCPI commands in return string.

(i.e. if ON, sending *IDN? will return with *IDN? and model information on

two separate lines).

5. KEY SONG Enable or disable the key sound when you press a key.

6. REVISION Shows the model number and firmware version of the instrument.