REMOTE OPERATION

All instrument functions, settings, and operating modes
(except for power on/standby) are controllable using com-
mands sent from an external computer via the GPIB
(IEEE-488 interface bus).
GPIB Address: Selectable from a system menu
IEEE-488 Interface Function Subset:
Source Handshake: SH1
Acceptor Handshake: AH1
Talker: T6
Listener: L4
Service Request: SR1
Remote/Local: RL1
Parallel Poll: PP1
Device Clear: DC1
Device Trigger: DT1
Controller Capability: C0, C1, C2, C3, C28
Tri-State Driver: E2
GPIB Status Annunciators: When the instrument is oper-
ating in Remote, the GPIB status annunciators (listed be-
low) will appear in a window on the front panel LCD.
REMOTE: Operating on the GPIB (all instrument front
panelkeys except for the SYSTEM key and the RETURN
TO LOCALsoft-key will be ignored).
LLO (LOCAL LOCKOUT): Disables the RETURN TO
LOCAL soft-key.Instrument can be placed in local mode
only via GPIB.
Emulations: The instrument responds to the published
GPIB commands and responses of the Anritsu Models
6600, 6700, and 6XX00-series signal sources. When emu-
lating another signal source, the instrument will be limited to
the capabilities, mnemonics, and parameter resolutions of
the emulated instrument.

GENERAL

Stored Setups: Stores front panel settings and nine addi-
tional front-panel setups in a non-volatile RAM. Asystem
menu allows saving and recalling of instrument setups.
Whenever the instrument is turned on, control settings
come on at the same functions and values existing when
the instrument was turned off.
Memory Sequencing Input: Accepts a TTLlow-level sig-
nal to sequence through nine stored setups. AUX I/O con-
nector,rear panel.
Self-Test: Instrumentself-test is performed when Selftest
soft-key is selected. If an error is detected, an error mes-
sage is displayed in a window on the LCD identifying the
probable cause and remedy.
Secure Mode: Disables all frequency,power level, and
modulation state displays. Stored setups saved in secure
mode remain secured when recalled. Mode selectable from
a system menu and via GPIB.
Parameter Entry: Instrument-controlled parameters can
be entered in three ways—keypad, rotary data knob, or the
Ùand Útouch pads of the cursor-control key.
The keypad is used to enter new parameter values; the
rotary data knob and the cursor-control key are used to
editexisting parameter values. The < and > touch pads of
the cursor-control key move the cursor left and right one
digit under the open parameter. The rotary data knob or
the Ùand Útouch pads will increment or decrement the
digit position over the cursor.
Keypad entries are terminated by pressing the appropri-
ate unit key (GHz/Sec/dBm, MHz/ms/dB, kHz/ms/STEPS,
or Hz/ns/ADRS). Edits are terminated by exiting the edit
menu.
Reset: Returns all instrument parameters to predefined de-
fault states or values. Any pending GPIB I/O is aborted. Se-
lectable from the system menu.
Master/Slave Operation: Allows two output signals
(68XXXB/C) to be swept with a user-selected frequency off-
set. One instrument controls the other via AUX I/O and SE-
RIALI/O connections. Requires a Master/Slave Interface
Cable Set (Part No. ND36329).
User Level Flatness Correction: Allows user to calibrate
out path loss due to external switching and cables via en-
tered power table from a GPIB power meter or calculated
data. When user level correction is activated, entered power
levels are delivered at the point where calibration was per-
formed. Supported power meters are Anritsu ML2437A,
ML2438A, and ML4803Aand HP 437B, 438A, and 70100A.
Five user tables are available with up to 801 points/table.
681XXC OM B-7
PERFORMANCE
SPECIFICATIONS