AimTTi TGR2050 Series Owner's manual

PROGRAMMING MANUAL
EN
TGR2050 SERIES
1.5GHz & 3GHz
RF Signal Generators

CONTENTS
SAFETY ................................................................................................................................................................... 2
Symbols..................................................................................................................................................................................................... 2
Safety notices ........................................................................................................................................................................................... 3
INSTALLATION......................................................................................................................................................... 4
Mounting .................................................................................................................................................................................................. 4
Ventilation................................................................................................................................................................................................. 4
Handle/stand ............................................................................................................................................................................................ 4
ELECTRICAL REQUIREMENTS................................................................................................................................... 5
Mains operating voltage .......................................................................................................................................................................... 5
Mains lead ................................................................................................................................................................................................ 5
FRONT PANEL ......................................................................................................................................................... 6
Overview................................................................................................................................................................................................... 6
REAR PANEL............................................................................................................................................................ 8
Connections overview.............................................................................................................................................................................. 8
MAINTENANCE ....................................................................................................................................................... 10
Cleaning .................................................................................................................................................................................................. 10
REMOTE OPERATION .............................................................................................................................................. 11
Overview................................................................................................................................................................................................. 11
Remote/ local operation ........................................................................................................................................................................ 11
USB interface .......................................................................................................................................................................................... 11
LAN interface .......................................................................................................................................................................................... 13
LAN connection ...................................................................................................................................................................................... 13
GPIB interface......................................................................................................................................................................................... 17
REMOTE COMMAND FORMAT................................................................................................................................ 24
USB and LAN........................................................................................................................................................................................... 24
GPIB......................................................................................................................................................................................................... 25
REMOTE CONTROL COMMANDS ............................................................................................................................ 26
SCPI Overview......................................................................................................................................................................................... 26
SCPI subsystems ..................................................................................................................................................................................... 28
Parameter data formats......................................................................................................................................................................... 29
SCPI COMMAND LIST.......................................................................................................................................... 30
Common commands .............................................................................................................................................................................. 30
Query commands ................................................................................................................................................................................... 32
SYSTem Subsystem commands .............................................................................................................................................................. 33
STATus Subsystem commands................................................................................................................................................................ 36
SOURce Subsystem Commands............................................................................................................................................................. 37
UNIT Subsystem commands .................................................................................................................................................................. 47
OUTPut Subsystem commands.............................................................................................................................................................. 48
TRIGger Subsystem commands ............................................................................................................................................................. 49
MMEMory Subsystem commands......................................................................................................................................................... 50
LEGACY COMMANDS.......................................................................................................................................... 51
Aim-TTi Legacy commands .................................................................................................................................................................... 51
FACTORY DEFAULT SETTINGS .............................................................................................................................. 52

1 - Safety
Symbols
2TGR2050 Series Programming Manual
SAFETY
Symbols
This instruction manual contains information and warnings which must be followed by the user
to ensure safe operation and to retain the instrument in a safe condition.
The following symbols are displayed on the instrument and throughout the manual, to ensure
the safety of the user and the instrument, all information must be read before proceeding.
WARNING
Indicates a hazard that, if not avoided, could result in injury or death.
CAUTION
Indicates a hazard that could damage the product that may result in loss of important data or
invalidation of the warranty.
NOTE
Indicates a helpful tip
EXAMPLE
Indicates an example to show further details
Terminal connected to chassis ground.
Standby supply. Instrument is not disconnected from AC
mains power when switch is off.
Alternating current.

1 - Safety
Safety notices
3TGR2050 Series Programming Manual
Safety notices
This instrument is:
-A safety Class I instrument according to IEC classification and has been designed to meet
the requirements of EN61010-1 (Safety Requirements for Electrical Equipment for
Measurement, Control and Laboratory Use).
-An Installation Category II instrument intended for operation from a normal single-phase
supply.
-Tested in accordance with EN61010-1 and has been supplied in a safe condition.
-Designed for indoor use in a Pollution Degree 2 environment in the temperature range 5°C
to 40°C, 20% - 80% RH (non-condensing).
WARNING
Do not operate while condensation is present.
Do not operate outside its rated supply voltages or environmental range.
THIS INSTRUMENT MUST BE EARTHED.
Any interruption of the mains earth connector, inside or outside, will make the instrument
dangerous. Intentional interruption is prohibited.
Any adjustment, maintenance and repair of the opened instrument under voltage must be
avoided.
When connected, terminals may be live and opening the covers or removal of parts (except
those that can be accessed by hand) may expose live parts.
To avoid electric shock, or damage to the instrument, never allow water to get inside the case.
If the instrument is clearly defective, has been subject to mechanical damage, excessive
moisture or chemical corrosion the safety protection may be impaired and it must be
withdrawn from use and returned for repair.
Ensure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.
This instrument uses a Lithium button cell for non-volatile memory battery back-up; typical life
is 5 years. In the event of replacement becoming necessary, replace only with a cell of the
correct type, i.e. 3V Li/Mn0220mm button cell type 2032. Exhausted cells must be disposed of
carefully in accordance with local regulations; do not cut open, incinerate, expose to
temperatures above 60°C or attempt to recharge.
CAUTION
Do not wet when cleaning, use only a soft dry cloth to clean the screen.

2 - Installation
Mounting
4TGR2050 Series Programming Manual
INSTALLATION
Mounting
This instrument is suitable for bench use and rack mounting.
For rack mounting the protective bezels and handle/stand should be removed such that the
instrument can be fitted beside any other standard 2U half-rack instrument in a 19” rack. A
suitable 2U 19” rack kit is available from the manufacturers or their overseas agents.
See rack mount instructions for details on how to remove the protective bezel and handle.
Ventilation
The instrument uses a fan fitted to the rear panel. Take care not to restrict the rear air exit or
the inlet vents at the front (sides and underneath). In rack-mounted situations allow adequate
space around the instrument and/or use a fan tray for forced cooling.
Handle/stand
The instrument is fitted with a 4-position handle/stand. Pull out both sides of the handle at the
case pivot points to free the position locking pegs and rotate the handle from the stowed
position to the required stand or handle position. Release the sides of the handle to lock it in
the new position.

3 - Electrical Requirements
Mains operating voltage
5TGR2050 Series Programming Manual
ELECTRICAL REQUIREMENTS
Mains operating voltage
This instrument has a universal input range and will operate from a nominal 115V or 230V
mains supply without adjustment. Check that the local supply meets the AC input requirement
given in the Specification.
Mains lead
Connect the instrument to the AC supply using the mains lead provided.
Should a mains plug be required for a different mains outlet socket, a suitably rated and
approved mains lead set should be used which is fitted with the required wall plug and an
IEC60320 C13 connector for the instrument end.
To determine the minimum current rating of the lead-set for the intended AC supply, refer to
the power rating information on the equipment or in the Specification.
WARNING
THIS INSTRUMENT MUST BE EARTHED.
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.
Before use, inspect provided mains lead for any signs of damage. Do not use if lead is
damaged.
Before use, inspect the instrument for any signs of damage. Do not use if damaged.

4 - Front Panel
Overview
6TGR2050 Series Programming Manual
FRONT PANEL
Overview
① Flash drive
This is a USB Host port for the connection of flash drive which conform to the Mass Storage
Class specification. FAT16 or FAT32 filing systems are accepted. .bmp files of the display can be
captured and exported using the flash drive port, see Print Screen’ for more details
② Colour touch screen display
CAUTION
Do not use sharp or pointed objects to operate the touch screen
③ Standby button
Illuminated when in standby. Press and hold to turn instrument on, quick press to turn off.
④ Parameter keys
FREQ (frequency) and AMP (amplitude)- select the requested parameter for editing. These keys
also return to the home screen.
Mode keys
MOD (modulation) or SWEEP menus, they become illuminated only when the mode is
activated ie. modulation is 'ENABLED' or sweep is 'RUN'.
Menu keys
STORES key allows access to files saved in the built-in storage and to a connected flash drive.
UTILITY key gives access to menus for a variety of functions such as: Instrument and System
settings, Remote Interface settings, Calibration, IQ Trim and more.
Trigger key
TRIGGER key is used to issue a manual trigger signal.

4 - Front Panel
Overview
7TGR2050 Series Programming Manual
⑤ Numeric keypad
Numeric keys permit direct entry of a value for the parameter currently selected.
⑥RF Output Port
This is a 50Ω N-type output socket. The maximum output is 1Vrms (+13dBm) into 50Ω. It can
tolerate a short circuit indefinitely. Protected against accidental connection of up to 50VDC.
NOTE
The N Type connector is a precision component that should be protected z excessive wear to
ensure that its RF characteristics (impedance and VSWR) are accurately maintained. If the
instrument is used in a manner that demands many connections/disconnections to and from
the RF OUT it is good practice to fit a male–to–female adaptor to the socket which can be
replaced periodically.
CAUTION
Do not apply external voltages to the RF output port.
⑦RF output key
The OUTPUT key switches the RF Output Port on or off. The key becomes illuminated when the
output is on.
⑧ Escape Key/ Local
Entry can be abandoned at any point by pressing the escape key, this key will also exit the
selection or screen currently selected. Additionally, this key is used to return to local from I/O.
⑨ Directional keys
The direction keys are used for navigating parameter windows, scrolling numeric parameter
values and selection lists, additionally these keys are used to apply step changes to the
frequency and amplitude.
⑩ Rotary knob
The rotary knob is used to navigate the user interface, it features a ‘press’ function to select an
option. See ‘Rotary knob principles’ for more details.

5 - Rear Panel
Connections overview
8TGR2050 Series Programming Manual
REAR PANEL
Connections overview
① AC power inlet
② Internal reference out
Internal reference out: 10MHz, >2Vpp into 50Ω
CAUTION
Do not apply external voltages to this output.
③External reference in
External Reference In: 10MHz, 2-5Vpp from 50Ω
CAUTION
Do not apply external voltages exceeding 5Vpp to this socket.
④Sync out
Automatically selected to be either Modulation Sync or Sweep Sync.
Output impedance 50Ω nominal. Logic levels of <0.8V & >3V unloaded.
SYNC will withstand a short circuit to ground.
CAUTION
Do not apply external voltages to this output.

5 - Rear Panel
Connections overview
9TGR2050 Series Programming Manual
⑤External trigger in
DC coupled External Trigger Input signal, nominal threshold 1.65V
CAUTION
Do not apply external voltages exceeding ±10V to this socket.
⑥Mod in/out
Analogue MOD IN, AC coupled 10kΩ input impedance, 1Vp-p full scale. Analogue MOD OUT,
DC coupled 150Ω source impedance, 2Vp-p full scale unloaded. Digital MOD IN, DC coupled
10kΩ input impedance, nominal threshold of +1.65V. Digital MOD OUT, DC coupled 150Ω
source impedance, logic levels of <0.8V & >3V unloaded.
CAUTION
Do not apply external voltages exceeding ±10V to this socket.
⑦ LAN
The LAN interface is designed to meet the LXI standard version 1.5 LXI Device Specification
2016.
Remote control using the LAN interface is possible using the TCP/IP Socket protocol.
⑧ USB
The USB port accepts a standard USB cable. If the USB driver has been installed from the
website, the Windows plug-and-play function should automatically recognise that the
instrument has been connected. See the support page on the website for information on
installing the driver on a PC at www.aimtti.com .
⑨GPIB / IEEE-488 (optional)
The default GPIB address is 11.

6 - Maintenance
Cleaning
10 TGR2050 Series Programming Manual
MAINTENANCE
The manufacturers or their agents overseas will provide a repair service for any unit developing
a fault. Where owners wish to undertake their own maintenance work, this should only be
done by skilled personnel in conjunction with the service guide which may be obtained directly
from the Manufacturers or their agents overseas.
Cleaning
If the instrument requires cleaning, use a cloth that is only lightly dampened with water or a
mild detergent.
WARNING
To avoid electric shock, or damage to the instrument, never allow water to get inside the case.
To avoid damage to the case never clean with solvents.

7 - Remote Operation
Overview
11 TGR2050 Series Programming Manual
REMOTE OPERATION
Overview
The instrument can be remotely controlled via its USB, LAN or (optional) GPIB interfaces.
USB remote control operates in a similar way to an RS232 interface but via the USB connector.
Software supplied with the instrument sets up the controlling computer to treat the USB
connection as a virtual COM port.
Application software on the computer can then access the instrument via that COM port.
The LAN interface is designed to meet 1.5 LXI Device Specification 2016.
Remote control using the LAN interface is possible using the TCP/IP Sockets protocol. The
instrument also contains a basic Web server which provides information on the instrument and
allows it to be configured from a web browser. Simple command line control from the browser
is also possible.
The instrument is supplied with USB and LAN as standard; GPIB is an option.
Remote/ local operation
At power-on the instrument will be in the local state and the REM indicator is not displayed on
the Status Line. In this state, all front panel operations are possible.
When the instrument receives a command from an interface the remote state will be entered
and the REM indicator will be displayed on the Status Line. In this state the front panel user
interface can still be navigated but no changes to parameters are possible.
The instrument may be returned to the local state by pressing the LOCAL key; however, the
effect of this action will only remain until the instrument receives another character from the
interface, when the remote state will once again be entered. Returning to Local by this action
will keep the settings at their last remotely set values.
USB interface
Using the USB interface for remote control requires a Communications Device Class driver on
the PC to provide a virtual COM port instance.
Windows 10 will automatically install a suitable driver. In earlier versions of Windows a suitable
driver is provided by Microsoft, but it is not installed by default. The data (.INF) file to control
the installation is provided on the website: www.aimtti.com
If required, unzip the contents of the downloaded USB driver.
NOTE
The same driver is also used by many other instruments from this manufacturer and may
already be known to the PC.

7 - Remote Operation
USB interface
12 TGR2050 Series Programming Manual
Installing USB driver for the first time
To install the driver for the first time:
·First switch the unit on
·Then connect the USB port to the PC.
NOTE
In Windows 10, the driver is automatically installed by the operating system.
The Windows plug and play functions should automatically recognise the attachment of new
hardware to the USB interface and (possibly after searching the internet for some time)
prompt for the location of a suitable driver. Follow the Windows prompts and point to the
downloaded driver file named USB_ARM_VCP_xxx.INF, where xxx is a version number.
In some cases, Windows will not complete this procedure (especially recent versions which
search the internet first, looking for the unique Vendor ID and Product ID), in which case the
instrument will show in Device Manager as “not working properly”. If this happens, select this
device, right click and choose “update driver software...” and then “browse this computer for
driver software...” and then locate the downloaded .INF file.
Once Windows has installed the device driver it will assign a COM port number to this
particular unit. This number will depend on previous COM port assignments on this PC, and it
may be necessary to use Device Manager to discover it. Each instrument has a unique USB
identifier which is remembered by the system, so it will receive the same COM port number
whenever it is attached to the same PC (regardless of the physical interface socket used), even
though the COM port will disappear while the instrument is disconnected or switched off.
Other instruments will receive different COM port numbers.
NOTE
A different PC will not necessarily assign the same COM port number to a particular instrument
(it depends on the history of installations) Device Manager can be used to change the
assignments given.
This virtual COM port can be driven by Windows applications (including a terminal emulator) in
exactly the same way as any standard COM port, except that the Baud rate and other settings
are unnecessary and are ignored. Some old applications might not function with COM port
numbers 3 or 4, or above 9. In this case, use Device Manager to change the allocation given.
Once it is installed, the driver will be maintained by Windows Update in the usual way.

7 - Remote Operation
LAN interface
13 TGR2050 Series Programming Manual
LAN interface
The LAN interface is designed to comply with the LXI standard version 1.5 LXI Device
Specification 2016 and contains the interfaces and protocols described below.
Since it is possible to misconfigure the LAN interface, making it impossible to communicate
with the instrument over LAN, a LAN Configuration Initialise (LCI) mechanism is provided via
the menus from the front panel to reset the instrument's interfaces to the factory default.
The default setting is for the instrument to attempt to obtain settings via DHCP if available or, if
DHCP times out (30 seconds), via Auto-IP.
In the very unlikely event that an Auto-IP address cannot be found a static IP address of
192.168.1.100 is assigned. Resetting the LAN removes any password protection which has
been set on the web page.
To reset the LAN interface, touch the Lan Reset button on the [Utility] > I/O menu.
For more information on LXI standards refer to www.lxistandard.org
LAN connection
To use the LAN interface, the IP address or the host name of the instrument must be known.
The assigned IP address of the instrument may be determined from the front panel controls by
pressing the [Utility] key followed by touching the I/O button.
Then select LAN Status and the assigned IP settings will be shown on the second page of the
displayed menu.
Alternatively, Windows PC software tools such as the LXI Discovery Tool may be used find all LXI
compliant devices on the network. The latest version of the LXI Discovery Tool can be
downloaded from www.lxistandard.org.
Note that older versions of the LXI Discovery Tool may not find this instrument as they only
support the legacy VXI-11 protocol which is not implemented in this instrument.
Connecting via a router is recommended as this is significantly quicker to assign an IP address;
connecting directly to the PC will begin to assign an IP address only after a 30 second DHCP
time-out. Double clicking on any entry in the list of devices discovered will open the PC's web
browser and display the Home page of that device.
There are also tools for LAN discovery included as part of the National Instruments
Measurement and Automation Explorer package and the Keysight (formerly Agilent) Vee
application.
The unit will, when first powered up, attempt to obtain settings via DHCP if available or, if DHCP
times out (30 seconds), via Auto-IP. In the very unlikely event that an Auto-IP address cannot
be found a static IP address of 192.168.1.100 is assigned. During this time the LAN indicator
will keep flashing and change to if a LAN connection is successfully made. However, if a
connection is still not made by the end of the above process, or if the LAN connector is
physically removed at any time, the LAN field in the status line will change to ; see ‘LAN
error’ section for details.

7 - Remote Operation
LAN connection
14 TGR2050 Series Programming Manual
Web server; configuration password protection
The unit contains a basic web server. This provides information on the instrument and allows it
to be configured. The Settings page can be password protected to deter unauthorised changes
to the remote operation configuration.
NOTE
The default configuration page password is blank (no password).
The Settings page itself explains how to set the password. The password can be up to 15
characters long; the User Name should be left blank. The password will, however, be reset to
the default (no password) if the front panel is used to reset all the LAN parameters to their
factory default.
The web pages also have an ‘Identify’ function which allows the user to send an identifying
command to the instrument which causes its display to flash until the command is cancelled.

7 - Remote Operation
LAN connection
15 TGR2050 Series Programming Manual
ICMP ping server
The unit contains an ICMP server allowing the instrument to be ‘pinged’ via either its host
name or IP address.
mDNS and DNS-SD support
Multicast DNS provides DNS services even on networks without a central DNS server (or DHCP
server). This simplifies the setting up of a simple LAN using meaningful hostnames instead of a
raw IP address. With service discovery it becomes straightforward for the device to be
discovered and the services it provides.
The services provided by the instrument are http (_http._tcp) , lxi (_lxi._tcp) and scpi-raw
(_scpi-raw._tcp).
VISA resource name
The instrument must be referred to by its raw socket information when used in software
packages which communicate via a VISA resource name. For example, an instrument at IP
address 192.168.1.100 would normally have a VISA resource name of
"TCPIP0::192.168.1.100::inst0::INSTR" but for this instrument the name must be modified to
read "TCPIP0::192.168.1.100::5025::SOCKET" where 5025 is the scpi-raw TCP port used by this
instrument for control and monitoring.
XML identification document URL
As required by the LXI Standard, the instrument provides an XML identification document that
can be queried via a GET at “http:<hostname>:80/lxi/identification” that conforms to the LXI
XSD Schema (available at http:www.lxistandard.org/InstrumentIdentification/1.0) and the W3C
XML Schema Standards ( http:www.w3.org/XML/Schema ). This document describes the
instrument.
TCP sockets
The instrument uses 1 socket on TCP port 5025 for instrument control and monitoring. Text
commands are sent to this port as defined in the ‘Remote Control Commands’ section and any
replies are returned via the same port. Commands may be separated with either semicolons
“;” or line feeds.
LAN error
If a LAN connection is made but an error is detected (e.g. the IP address is the same as another
device on the network) then the LAN field in the status line will show until the error is
corrected.
If a LAN error occurs; check and correct the configuration of the instrument; To reset the LAN
interface touch the LAN Reset button on the [Utility] > I/O menu. The default setting is for the
instrument to attempt to obtain settings via DHCP if available or, if DHCP times out (30
seconds), via Auto-IP. In the very unlikely event that an Auto-IP address cannot be found a
static IP address of 192.168.1.100 is assigned. If no physical LAN connection is found at any
time the LAN field in the status line will show

7 - Remote Operation
LAN connection
16 TGR2050 Series Programming Manual
LAN
The LAN field in the Status Line can show multiple status indications:
-There is no LAN connection, for example no cable connected.
Successfully connected.
(Flashing icon) Configuring LAN connection.
-Unsuccessful attempt to connect.

7 - Remote Operation
GPIB interface
17 TGR2050 Series Programming Manual
GPIB interface
The GPIB interface 24-way connector is located on the instrument rear panel. The pin
connections are as specified in IEEE Std. 488.1-1987 and the instruments in the range complies
with IEEE Std. 488.1-1987 and IEEE Std. 488.2-1987 and contain the following IEEE 488.1
subsets.
GPIB subsets
This instrument contains the following IEEE 488.1 subsets:
Source Handshake
SH1
Acceptor Handshake
AH1
Talker
T6
Listener
L4
Service Request
SR1
Remote Local
RL2
Parallel Poll
PP1
Device Clear
DC1
Device Trigger
DT0
Controller
C0
Electrical Interface
E2
GPIB IEEE Std. 488.2 error handling – Query error register
The IEEE 488.2 UNTERMINATED error (addressed to talk with nothing to say) is handled as follows.
If the instrument is addressed to talk and the response formatter is inactive and the input
queue is empty then the UNTERMINATED error is generated. This will cause the Query Error bit to
be set in the Standard Event Status Register, a value of 3 to be placed in the Query Error
Register and the parser to be reset. See ‘Status reporting’ section for further information.
The IEEE 488.2 INTERRUPTED error is handled as follows. If the response formatter is waiting to
send a response message and a <PROGRAM MESSAGE TERMINATOR> has been read by the parser or
the input queue contains more than one END message then the instrument has been
INTERRUPTED and an error is generated. This will cause the Query Error bit to be set in the
Standard Event Status Register, a value of 1 to be placed in the Query Error Register and the
response formatter to be reset thus clearing the output queue. The parser will then start
parsing the next <PROGRAM MESSAGE UNIT> from the input queue. See ‘Status reporting’section
for further information.
The IEEE 488.2 DEADLOCK error is handled as follows. If the response formatter is waiting to
send a response message and the input queue becomes full then the instrument enters the
DEADLOCK state and an error is generated. This will cause the Query Error bit to be set in the
Standard Event Status Register, a value of 2 to be placed in the Query Error Register and the
response formatter to be reset thus clearing the output queue. The parser will then start
parsing the next <PROGRAM MESSAGE UNIT> from the input queue. See ‘Status reporting’
section for further information.

7 - Remote Operation
GPIB interface
18 TGR2050 Series Programming Manual
GPIB parallel poll
Complete parallel poll capabilities are offered on this instrument. The Parallel Poll Enable
Register is set to specify which bits in the Status Byte Register are to be used to form the ist
local message The Parallel Poll Enable Register is set by the *PRE <nrf> command and read by
the *PRE? command. The value in the Parallel Poll Enable Register is ANDed with the Status
Byte Register; if the result is zero then the value of ist is 0 otherwise the value of ist is 1.
The instrument must also be configured so that the value of ist can be returned to the
controller during a parallel poll operation. The instrument is configured by the controller
sending a Parallel Poll Configure command (PPC) followed by a Parallel Poll Enable command
(PPE). The bits in the PPE command are shown in the following table:
EXAMPLE
To return the RQS bit (bit 6 of the Status Byte Register) as a 1 when true and a 0 when false in
bit position 1 in response to a parallel poll operation send the following commands
*PRE 64<pmt>, then PPC followed by 69H (PPE)
The parallel poll response from the instrument will then be 00H if RQS is 0 and 01H if RQS is 1.
During parallel poll response the DIO interface lines are resistively terminated (passive
termination). This allows multiple devices to share the same response bit position in either
wired-AND or wired-OR configuration, see ‘GPIB interface’ for more information.
Status reporting
The standard status and error reporting model described in IEEE Std. 488.2 was designed for
the GPIB interface and contains some features intended for use with the Service Request and
Parallel Poll hardware capabilities of that interface, and to accommodate its semi-duplex
operation. Although those facilities are of little use with other interfaces, this instrument
makes the full set of capabilities available to all of the interfaces. All the remote interfaces
share the same set of status and error registers.
The full set of error and status registers and the individual bits they contain is shown in the
Status Model Diagram and described in detail below, but in brief the status is maintained using
three primary registers, the Standard Event Status Register, the Operation Status Register and
the Event/Error Queue Register.
Bit 7 = X don't care
Bit 6 = 1
Bit 5 = 1 Parallel poll enable
Bit 4 = 0
Bit 3 = Sense sense of the response bit; 0 = low, 1 = high
Bit 2 = ?
Bit 1 = ? bit position of the response
Bit 0 = ?

7 - Remote Operation
GPIB interface
19 TGR2050 Series Programming Manual
Standard event status and standard event status enable registers
These two registers are implemented as required by the IEEE Std. 488.2.
Any bits set in the Standard Event Status Register which correspond to bits set in the Standard
Event Status Enable Register will cause the ESB bit to be set in the Status Byte Register.
The Standard Event Status Register is read and cleared by the *ESR? command. The Standard
Event Status Enable register is set by the *ESE <nrf> command and read by the *ESE?
command.
It is a bit field where each bit has the following significance.
Bit 7: Power On. Set when power is first applied to the instrument.
Bit 6: User Request (Not used).
Bit 5: Command Error. Set when a syntax type error is detected in a command from the
bus. The parser is reset and parsing continues at the next byte in the input stream
Bit 4: Execution Error. Set when an error is encountered while attempting to execute a
completely parsed command. The appropriate error number will be reported in the
Execution Error Register, see ‘Error / Event Queue.’ section
Bit 3: Not used.
Bit 2: Query Error. Set when a query occurs. The appropriate error number will be
reported in the Query Error Register, see ‘Error messages’ section.
Bit 1: Not used.
Bit 0: Operation Complete: Set in response to the ‘*OPC’ command.