HMC-T2200 Synthesized Signal Generator Family
HMC-T2220/4 0
Analog, Digital & Mixed-Signal ICs, Modules, Subsystems & Instrumentation
Programmer’s Manual
Installation, Operation & Maintenance Guide
for HMC-T2220 & HMC-T2240
HMC-T2220/40
131547 Rev C - 02.1110
ECN#CP110064
Order On-Line at: www.hittite.com
Receive the latest product releases - click on “My Subscription”
978-250-3343 tel • 978-250-3373 fax • sales@hittite.com
20 Alpha Road Chelmsford, MA 01824
HMC-T2200 Synthesized Signal Generator Family User Manual
Table of Contents
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 USB Quick Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1 HyperTerminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.2 Tera Term Pro Terminal Emulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.3 HMCT2XXXGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 GPIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1 GPIB Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.2 GPIB Feature Set and Other Implementation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1 Ethernet Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1.1 Ethernet Addressing: Turning DHCP ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.1.2 Ethernet Addressing: Static IP Address Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.1.3 Telnet Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.3.3 Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.3.1 Example: Sockets with VISA drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.3.4 Ethernet Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.0 SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 SCPI Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 SCPI Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.1 ABORt - Stop Sweeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.1.1 Example: Shut Off a Continuous Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.3.2 *CLS - Clear Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.2.1 Example: Reset Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.3.3 DCL - Device Clear - See SDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.4 DIAGnostic:COMPatibility[?] - Compatibility Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.4.1 Example: DIAGnostic:COMPatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.3.5 DIAGnostic:MACaddress? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.5.1 Example: Read theMAC Address from a HMC-T2240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.3.6 DISPlay:ENABle[?] - LCD ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.6.1 Example: Preventing the display from changing at *RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.7 DISPlay:[WINDow:]TEXT:CLEar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.8 DISPlay:[WINDow:]TEXT[:DATA] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.8.1 Example: Front Panel LCD control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.3.9 DISPlay:[WINDow:]TEXT:LOCate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.10 DISPlay:[WINDow:]TEXT:STATe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.11 *ESE[?] - Event Status Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.11.1 Example: Errors Propagate to STB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.3.12 *ESR? – Event Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.12.1 The bits in the ESR: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.12.2 Example: Detect an error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3.13 FORMat:SREGister[?] – Decimal/Hex/Binary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.13.1 Example: FORMat:SREGister . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3.14 FREQuency – See [SOURce:]FREQuency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3.15 GET – Group Execute Trigger (GPIB only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3.15.1 PPE - Parallel Poll Enable (GPIB Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
v02.1110
2
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
Table of Contents (Continued)
3.3.15.1.1 Example: GPIB Parallel Poll with GET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.3.16 *IDN? – Identify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3.16.1 Example: *IDN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.17 INITiate:CONTinuous[:ALL][?] – Start Sweeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.17.1 Example: Start Continuous Sweep. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.18 INITiate[:IMMediate][:ALL] – Start a Single Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.18.1 Example: Start Sweep with Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.19 *IST? - Individual Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.20 OUTPut[:STATe][?] – RF Output On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.20.1 Example: RF On/Off State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.20.2 Example: Output with Frequency and Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.21 *OPC – Operation Complete Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.21.1 Example: Operation Complete. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
3.3.22 *OPC? – Operation Complete Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.22.1 Example: Monitoring Sweep Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
3.3.23 POWer – See [SOURce:]POWer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.24 *PRE[?] - Parallel Poll Register Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.25 *RST - Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.26 SDC – Selected Device Clear – Control Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.26.1 Example: Using Ctrl-D to Regain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.27 [SOURce:]FREQuency:CENTer[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3.27.1 Example: Center and Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3.27.2 Example: Center and Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3.27.3 Example: Center Frequency Min/Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3.28 [SOURce:]FREQuency[:FIXed|:CW][?] – Output Frequency/frequency . . . . . . . . . . . . . . . . . 28
3.3.28.1 Example: Frequency Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3.29 [SOURce:]FREQuency[:FIXed|:CW]:STEP[:INCRement][?] – Frequency Step . . . . . . . . . . . 29
3.3.29.1 Example: Frequency Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.30 [SOURce:]FREQuency:MODE – Sweep Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.30.1 Example: FREQuency:MODE[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.31 [SOURce:]FREQuency:RESolution[?]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.31.1 Example: Frequency Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.32 [SOURce:]FREQuency:SPAN[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.33 [SOURce:]FREQuency:STARt[?]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.34 [SOURce:]FREQuency:STOP[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.35 [SOURce:]POWer:CENTer[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.35.1 Example: Setting Up a Power Sweep with Center and Span . . . . . . . . . . . . . . . . . . . . . . . . . . .32
3.3.36 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude][?] - Output Power . . . . . . . . . . . . . . . . . 32
3.3.37 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude]:RESolution? . . . . . . . . . . . . . . . . . . . . . . 32
3.3.38 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude]:STEP[:INCRement][?] . . . . . . . . . . . . . . 32
3.3.39 [SOURce:]POWer:SPAN[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.40 [SOURce:]POWer:STARt[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.40.1 Example: Setting Up a Power Sweep with Start and Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.41 [SOURce:]POWer:STOP[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.42 [SOURce:]SWEep:COUNt[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.43 [SOURce:]SWEep:DIRection[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3.43.1 Example: Sweep Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
3
HMC-T2200 Synthesized Signal Generator Family User Manual
Table of Contents (Continued)
3.3.44 [SOURce:]SWEep:DWELl[?]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3.44.1 Example: Dwell Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3.45 [SOURce:]TRIGger:SLOPe POSitive|NEGative|EITHer[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3.45.1 Example: Trigger a sweep on the falling edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.46 *SRE[?] – Service Request Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.47 STATus:OPERation:CONDition? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.48 STATus:OPERation Register Bit Denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.48.1 Example: Operation Condition Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.49 STATus:OPERation:ENABle[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.50 STATus:OPERation[:EVENt]?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.51 STATus:PRESet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.52 STATus:QUEStionable:CONDition? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.53 STATus:QUEStionable Register Bit Denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.3.54 STATus:QUEStionable:ENABle[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.3.55 STATus:QUEStionable[:EVENt]?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.3.56 STATus:SRQChar[?] – Service Request over USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.3.56.1 Example: STATus:SRQChar – Service Request Character . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.57 *STB? – Status Byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.58 Status Byte (STB) Bit Denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.59 SWEep – See [SOURce:]SWEep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.60 SYSTem:COMMunicate:ETHernet:ADDRess[?] – IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.60.1 Example: Network conguration with DHCP OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.61 SYSTem:COMMunicate:ETHernet:DHCP[?] – Automatic Conguration . . . . . . . . . . . . . . . . . 40
3.3.61.1 Example: Network Conguration with DHCP ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.3.62 SYSTem:COMMunicate:ETHernet:GATeway[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.3.63 SYSTem:COMMunicate:ETHernet:NETMask[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.3.64 SYSTem:COMMunicate:ETHernet:PORT[?] – Socket Number . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.3.65 SYSTem:COMMunicate:GTLocal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.3.65.1 Example: Go To Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
3.3.66 SYSTem:COMMunicate:GTRemote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.3.66.1 Example: Go To Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
3.3.67 SYSTem:ERRor:ALL? – Read All Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.3.67.1 Example: Read All Error Messages from Error Queue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
3.3.68 SYSTem:ERRor:BEHavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.3.68.1 Example: Issue Error Messages Immediately . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
3.3.69 SYSTem:ERRor[:NEXT]?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3.69.1 Example Read Error Message from Error Queue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3.70 SYSTem:KLOCk[?] – Front Panel Control Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3.70.1 Example: Local Lockout with KLOCk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3.71 SYSTem:PRESet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3.72 *TRG – Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.3.72.1 Example: *TRG – Trigger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.3.73 TRIGger[:SEQuence][:IMMediate] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.3.74 TRIGger[:SEQuence][:IMMediate]:SOURce[?] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.3.74.1 Example: Trigger Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.3.75 *WAI – Wait for Operation (Sweep) to Complete . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.3.75.1 Example: *WAI to Wait for Sweep to Complete . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
v02.1110
4
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
1.0 Introduction
The HMC-T2200’s are SCPI based signal generators supporting CW and stepped sweep operation
through USB, GPIB and Ethernet.
Note: The programming capability outlined in this manual is for the HMC-T2200 Synthesized Signal
Generator Family. For simplicity only the HMC-T2240 will be referenced throughout the document.
2.0 Quick Start
2.1 USB Quick Start
The HMC-T2240 presents its USB port as a serial port. The serial port interface is easy to control
from virtually any programming language or environment and requires no drivers other than the ones
distributed with Windows and a Hittite provided .INF to use. Any application which can access a serial
port (ie. Windows COM port) can talk directly to the HMC-T2240.
Where is the automobile.
2.1.1 HyperTerminal
You can use an application like HyperTerminal to send SCPI commands directly to it to try things out
and for debug. HyperTerminal is no longer available on Windows 7®. See the section below on Tera
Term Pro or use any terminal program you prefer.
HyperTerminal is part of the standard Windows distribution (prior to Windows 7®) and can be found
under the Start button:
Start -> Programs -> Accessories -> Communications -> HyperTerminal
The serial port settings that Windows and HyperTerminal present (baud rate, parity, stop bits) are
unused. However, you may want to “Echo typed characters locally” so you can see what you are
typing.
From within HyperTerminal:
File -> Properties
On the Properties dialogue box, select the Settings tab.
Click the ASCII Setup… button.
Check the Echo typed characters locally box.
You may also want to check the Send line ends with line feeds and Wrap lines that exceed ter-
minal width boxes. (The HMC-T2240 doesn’t need them, but they make the output more readable.)
2.1.2 Tera Term Pro Terminal Emulator
Tera Term Pro is a free terminal emulation program which can connect to the HMC-T2240 over USB,
Telnet, and RS-232.
It can be downloaded from many websites, including:
http://forceforge.jp/projects/ttssh2/
While the above website did not claim Windows 7® support when this document was written, Tera
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
5
HMC-T2200 Synthesized Signal Generator Family User Manual
Term Pro was used under Windows 7® to generate some of the examples.
A strictly minimal installation (“Tera Term & Macro”) is sufficient.
Once Tera Term (version 4.67 for this example) is running, use
Setup -> Terminal...
and verify the following:
Receive: LF
Transmit: CR+LF
Local echo Checked (Unchecked for Telnet)
Coding UTF-8
Terminal size 80 x 24
Term size = win size Checked
Terminal ID: VT100
Answerback:
v02.1110
Auto switch Unchecked
locale: american
CodePage: 65001
also:
Setup -> Serial port...
and verify the following:
Port: <Don’t Care>
Baud rate: 115200
Data: 8 bit
Parity: none
Stop: 1 bit
Flow Control: none
To select a connection:
File -> New Connection...
For USB, select Serial, then Port: should have an option for:
COMn: HMC-T2240 Signal Generator (COMn)
If you do not see the option listed, you may already be connected.
File -> Disconnect
You should now be able to type commands like “*IDN?” and see the response.
Once it is working, save the settings using:
Setup -> Save setup...
Hittite Microwave Corporation is not involved in the development or distribution of Tera Term Pro and
6
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
cannot guarantee it or provide technical support for it; it is merely identied as a possible alternative to
HyperTerminal. See the Tera Term Pro software and websites for terms of license and documentation.
2.1.3 HMCT2XXXGUI
The HMC-T2200 install CD contains a graphical interface called HMCT2XXXGUI which allows you to
program Frequency, Power, RF Output, and sweep related parameters.
The display has a pull-down list of synthesizers which can be selected. Note that if another application has a synthesizer open, you will not be able to open it from HMCT2XXGUI.
There is a right click menu which allows you to
• Refresh the display without having to go up to the button at the top.
• Remap Hardware to update the pull-down list of signal generators when units have been
added or removed.
• Close a HMC-T2240 so it will be available for other applications to use.
• Show Sweep Parameters can be unchecked to make the display smaller if you aren’t
sweeping.
HMC-T2200 Synthesized Signal Generator Family User Manual
• About… shows revision information.
You can bring up multiple copies of HMCT2XXXGUI if you have multiple synthesizers to control.
HMCT2xxxGUI only works over USB.
2.2 GPIB
The HMC-T2240 IEEE 488.2 (GPIB) interface supports all of the applicable 488.2 and SCPI commands supported over USB and Ethernet plus a number of IEEE 488.1 specic features including
service requests, serial polls, parallel polls, group execute trigger, and high speed operation.
2.2.1 GPIB Quick Start
The HMC-T2240 GPIB Address can be set by pressing and holding the front panel knob for 2 seconds. When the “GPIB Addr:” screen appears, turn the knob to change the value, then press and
hold the knob again to get the screen with the serial number (SN), hardware version (HW VER), and
software version (SW VER), and press and hold the knob again to get back to the normal display. The
GPIB Address can also be set through any of the programming interfaces.
No drivers beyond the ones that come with your GPIB controller should be necessary.
2.2.2 GPIB Feature Set and Other Implementation Information
This section includes various information related to GPIB (IEEE 488.1(E):2003/IEC 60488-1(E):2004)
standard compliance.
The HMC-T2240 supports the following GPIB functions:
Function Symbol
Source Handshake SH1
Acceptor Handshake AH1
Talker, no “talk only” mode T6
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
7
HMC-T2200 Synthesized Signal Generator Family User Manual
Function Symbol
Listener, no “listen only” mode L4
Service Request SR1
Remote/Local RL1
Parallel Poll, Remote conguration PP2
Device Clear DC1
Device Trigger DT1
No Controller capability C0
Source Handshake, Extended SHE1
Acceptor Handshake, Extended AHE1
Conguration CF1
Three State Drivers (open collector during parallel poll) E2
The HMC-T2240’s hardware input buffer holds 16 bytes. The maximum input string length is 256
bytes. New input beyond what will t in the hardware buffer is not accepted until all the commands
in the current string have been parsed (translated into an executable form) but not necessarily
executed. The IEEE 488.2 dened INTERRUPTED and UNTERMINATED errors will be issued if
new commands are sent before the output of previous queries has been read or if a read is started
before a complete command line has been sent.
v02.1110
For best performance, read output as soon as it becomes available. MAV (Message Available) does
not get set until output is ready to send. If there are multiple queries on one line, MAV may be dropped
between queries, particularly if there is a slow operation between them. Queries generally collect
their information in the execution phase to preserve FIFO order relative to the commands that go
before or come after them, but error messages are put into the error queue in the order they are
detected. See SCPI Tips, section 3.2, for query message length information.
The HMC-T2240 accepts input lines terminated with EOI (a GPIB signal which can be asserted
with the last character of a string,) newline (10, 0x0A, \n,) or both. The carriage return character (13,
0x0D, \r,) is not recognized by the IEEE 488 standard and is treated as whitespace.
The HMC-T2240 output lines are terminated with both EOI and newline.
Serial Polls and Parallel Polls can be used at “any” time, including while *WAI and *OPC? are in effect, and are unlikely to introduce signicant jitter.
(As the unit is addressed and unaddressed over GPIB, small delays are incurred, but they will not affect sweep timing, for instance.)
Normal commands (such as *STB?) are blocked by *WAI and *OPC? until the sweep is completed.
Commands which affect the RF output (FREQuency, POWer, OUTPut) may interfere with sweep
timing.
Note: Local Lockout (LLO) does not lock out the USB and Ethernet interfaces. This is contrary to the
IEEE 488 specs which consider anything other than GPIB to be a “local” control.
If Local Lockout is active and the user presses and holds the front panel knob, the URQ (User Request) bit in the ESR will be set, and, if *ESE and *SRE are set appropriately, a service request can
8
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
be generated so the controlling program can restore local control when it is safe to do so.
The GPIB Address is in the range 0 to 30. Attempting to program it outside this range will result in
an error. The HMC-T2240 does not use secondary addressing. *AAD and *DLF, which allow automatic address assignment, are not supported. It is not necessary to power cycle the HMC-T2240 after
changing the GPIB Address. However, changing it during a GPIB operation may result in undesirable
behavior.
The HMC-T2240 goes into its *RST state after power on. The *PSC command is not supported at
this time.
The following commands are coupled: STARt, STOP, CENTer, SPAN (frequency and power.)
2.3 Ethernet
The HMC-T2240 supports Socket and Telnet connections over Ethernet with the same functionality
as USB. The Socket interface is a programming interface; Telnet is for typing commands in by hand
for setup or debug. Any of the SCPI commands can be sent from any interface, so you can use USB
or Telnet to set the Socket Port number, for instance. In order to use a Socket or Telnet, the address
of the HMC-T2240 must be congured.
HMC-T2200 Synthesized Signal Generator Family User Manual
No drivers beyond the ones that come with normal networked computers should be necessary.
2.3.1 Ethernet Addressing
The goal of conguring the HMC-T2240’s Ethernet settings is to get it to work on your network. Consulting your network administrator about how to congure this device can save a lot of time.
The easiest way to congure the HMC-T2240’s Ethernet address is with DHCP. If your network is
congured for DHCP (Dynamic Host Conguration Protocol), you should1 be able to connect to the
HMC-T2240 to the network and access it through its host name like any other computer.
The HMC-T2240’s host name (machine name) is:
HMCT2240-<serial number>
where <serial number> is the 6 digit serial number shown when the unit turns on. You can also nd
the serial number by pressing and holding the front panel knob twice; the rst press and hold takes
you to the GPIB address screen and the second shows the serial number and rmware revisions.
Press and hold the knob again to go back to the main display.
Reasons you might not want to use DHCP include:
• You are connecting a PC directly with a cable, and most PCs are not set up as DHCP servers. (The HMC-T2240 has auto-MDIX; crossover cables not required.)
• Routers or other network hardware do not support or are not congured for DHCP or name
service.
• You have multiple equipment racks, each of which has its own router. Rather than refer to
the instruments by name (which is different for each unit, or may not work) the IP Address
is the same for each instrument within a rack so the same software with hard coded IP Ad-
1. A name server must also be set up. Some network congurations will support DHCP but not looking up devices by name.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
9
HMC-T2200 Synthesized Signal Generator Family User Manual
dresses can be run on any rack. (This is commonly done with GPIB addresses. Note that
IP Addresses must be unique within a subnet. The router within the rack denes each subnet. The subnets can be connected to the building network through the router or a second
network connection in a PC, depending on the level of isolation desired for the equipment
rack.)
2.3.1.1 Ethernet Addressing: Turning DHCP ON
To turn DHCP ON, send the following command through the USB or GPIB interfaces (assuming the
Ethernet connection isn’t working.)
SYSTem:COMMunicate:ETHernet:DHCP ON
You must power cycle the HMC-T2240 before this setting will take effect. You may also want to set
the socket port number (discussed below) before power cycling.
You will also need to power cycle the HMC-T2240 when you move it from one network to another to
re-start the DHCP address assignment process.
v02.1110
2.3.1.2 Ethernet Addressing: Static IP Address Assignment
If your address strategy is to use static IP addresses, turn DHCP off and set the ADDRess, NETMask,
and GATeway. (You will need to substitute the correct values for your network.)
syst:comm:eth:DHCP OFF
syst:comm:eth:ADDRess 192.168.1.105
syst:comm:eth:NETMask 255.255.255.0
syst:comm:eth:GATeway 192.168.1.1
You must power cycle the HMC-T2240 before these settings will take effect. You may also want to set
the socket port number (discussed below) before power cycling.
2.3.1.3 Telnet Example
The following example comes from running the Windows telnet client from the command line. Replace the 000000 with the actual serial number from your unit. You can also type in the IP Address
instead of hmcT2240-000000.
C:\>telnet hmcT2240-000000
*========================================================*
* Hittite T2240 Embedded Telnet Server *
*========================================================*
*idn?
Hittite,HMC-T2240,000000,1.8 5.3
syst:comm:eth:dhcp?
1
syst:comm:eth:port?
56789
syst:comm:eth:addr?
10.0.0.3
syst:comm:eth:netm?
10
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
255.255.255.0
syst:comm:eth:gat?
10.0.0.1
(Press Ctrl-C to get out of a command line Telnet session.)
You can also control the RF hardware with any of the normal SCPI commands.
See Also: Example: Network conguration with DHCP OFF, Example: Network Conguration
with DHCP ON
2.3.3 Sockets
The HMC-T2240 Socket interface is the connection to use from a program. It has the same capability
as a USB connection.
In addition to the Host Name or IP Address, you need to know the socket port number.
SYSTem:COMMunicate:ETHernet:PORT?
56789
SYSTem:COMMunicate:ETHernet:PORT 65432
HMC-T2200 Synthesized Signal Generator Family User Manual
The range of legal PORT values is 0 to 65535. Pick a value consistent with your existing applications.
If you do not already have a standard port number, pick one from the range 49152-65535. Lower
number ports may already be in use (23 = Telnet) or be used in the future (80 = HTTP, 111 = VXI-11,
5044 = LXI, for example) or may be used by common network protocols. (See http://www.iana.org/
assignments/port-numbers for details.)
You must power cycle the HMC-T2240 to make this change take effect.
2.3.3.1 Example: Sockets with VISA drivers
The following code opens a socket connection to an HMC-T2240 and reads the *IDN? string. (This
code was tested with LabWindows 8.1.)
#include <ansi_c.h>
#include <cvirte.h>
#include <visa.h>
int main (int argc, char *argv[])
{
char cmd[] = “*idn?\n”;
char readbuf[256];
int byt;
int err;
ViSession vihdl = 0;
int Rsrc=0;
char constring[128];
unsigned SerialNum = 0;
unsigned short PortNum = 54321;
char IPAddr[] = “10.0.0.2”;
viOpenDefaultRM (&Rsrc);
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
11
HMC-T2200 Synthesized Signal Generator Family User Manual
// sprintf(constring, “TCPIP::HMCT2240-%06u::%u::SOCKET”, SerialNum, PortNum);
sprintf(constring, “TCPIP::%s::%u::SOCKET”, IPAddr, PortNum);
viOpen(Rsrc, constring, 4, 0, &vihdl);
viSetAttribute(vihdl, VI_ATTR_TERMCHAR_EN, VI_TRUE);
viSetAttribute(vihdl, VI_ATTR_TMO_VALUE, 10000);
viSetAttribute(vihdl, VI_ATTR_TERMCHAR, 0x0A);
viSetAttribute(vihdl, VI_ATTR_SEND_END_EN, VI_TRUE);
viSetAttribute(vihdl, VI_ATTR_IO_PROT, VI_PROT_NORMAL);
err = viWrite(vihdl, cmd, sizeof(cmd)-1/*ignore NULL*/, &byt);
err = viRead (vihdl, readbuf, 255, &byt);
readbuf[byt] = 0; // input not null terminated
printf(“%s\n”, readbuf);
viClose (vihdl);
return err; // set breakpoint here to prevent output window from going away
}
2.3.4 Ethernet Security
v02.1110
The HMC-T2240 is intended to be used within a “safe” network environment such as a company network or a private subnet within an equipment rack.
The HMC-T2240 does NOT have password protection or other mechanisms to prevent unauthorized
access.
The HMC-T2240 does not run Windows or any UNIX variant and does not support rmware updates
over Ethernet so it is not considered vulnerable to infection by viruses.
3.0 SCPI Command Reference
3.1 SCPI Conformance Information
The HMC-T2240 (SW Ver 2.02) command set is based on the SCPI standard, version 1999.0, but is
not SCPI compliant because of the following:
• SYSTem:VERSion? - SCPI version - not compliant à not implemented
• UNIT:POWer – Only dBm supported.
• This document does not meet all SCPI documentation requirements.
3.2 SCPI Tips
The following tips may be helpful for understanding the SCPI instrument behavior.
• SCPI commands are not case sensitive. *IDN? and *idn? are considered the same command.
• CAPitalized letters indicate the “short form” of a command. FREQ is the short form of FRE-
Quency.
• Words in [brackets] are optional. OUTPut[:STATe] means you can use OUTPut:STATe if you
2. The software version may be found by pressing and holding the front panel knob to get the GPIB address menu and then pressed again to get the serial
number and revision information. It is labeled with SW VER:.
12
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
want to, but OUTPut or OUTP is sufficient. The leading [SOURce:] in front of FREQuency,
POWer, and SWEep is also optional.
• Commands ending in question marks (?) are called queries and return results.
• Separate multiple commands on a line with semicolons (;). FREQ 3e9;POW -3.3; OUTP
ON is a legal command. Multiple queries on the same line result in all the query results
coming back on the same line, separated by semicolons. FREQ?;POW?;OUTP? returns
3000.00e6;-3.3;1. (The trailing “1” corresponds to Boolean “true” for ON; 0 means OFF.)
When you specify a “:” for a command, subsequent commands on the same line are expected to start at the same level of the command tree as the previous command. This allows
you to say FREQ:STAR 1e9;STOP 2e9;STEP 10e6 without repeating FREQ every time.
However, to change from a command with one command path ([SOURce:]FREQuency)
to another (SWEep), it is necessary to start the following command with a “:” to indicate
that the next command is starting as if it were the rst command. FREQ:MODE SWE;
SWE:DWEL 0.1s results in the error -113,”Undened header” because there is no command “FREQ:SWE:DWEL.” FREQ:MODE SWE; :SWE:DWEL 0.1s works as expected.
• If you send a command and it does not affect the hardware or return a value, check for errors. SYST:ERR? will return an error message or 0,”No error” if there are no errors left to
read back. You can read back multiple errors at one time with SYST:ERR:ALL?.
• Input lines are limited to 256 characters, including the carriage return and/or line feed. (HMCT2240 specic)
• Output from any one query is limited to 256 characters, including the carriage return and/or
line feed, or the “;” separating it from the output of another query on the same line. If multiple
queries are on the same line, the total output on one line can exceed 256 characters, up 256
characters per query. An important exception is SYST:ERR:ALL? which can return 10 error
messages of up to 256 characters each plus -350, “Queue overow” for a total of 2583
characters from one query.
• The only “overlapped” operation supported by the HMC-T2240 is sweeping. All other operations must complete their execution (but not necessarily hardware settling or having their results read back) before the next command can execute. If a command takes time to execute
and you need to synchronize with other instruments, use *OPC? or *OPC. To delay the next
command (sent only to the HMC-T2240) until a sweep completes, use *WAI.
• Expressions (FREQ 3GHz + 10 kHz, for example) are not supported.
3.3 SCPI Command Reference
This section describes the commands supported by the HMC-T2240.
3.3.1 ABORt - Stop Sweeping
ABORt stops a running sweep.
If SWEep:CONTinuous ON, the sweep will restart (INITiate) immediately; turn SWEep:CONTinuous
OFF before issuing ABORt to prevent sweep from restarting.
ABORt will not interrupt *OPC? or *WAI. See SDC.
ABORt is an event and does not have a query form.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
13
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.1.1 Example: Shut Off a Continuous Sweep
INIT:CONT OFF;:ABOR
3.3.2 *CLS - Clear Status
*CLS clears the following status registers:
• ESR (488.2 Standard Event Status Register)
• STATus:OPERation:EVENt
• STATus:QUEStionable:EVENt
It also empties the Error Queue and clears the ag set by *OPC.
See Also: *RST, STATus:PRESet, SDC, *ESR?.
*CLS is an event and does not have a query form.
3.3.2.1 Example: Reset Status
To “fully” reset the instrument according to SCPI-99 Vol 2-20.2 (PRESet)
v02.1110
*CLS;*SRE 0; *ESE 0; STATus:PRESet
Note that *RST is required if you also want to reset hardware state.
3.3.3 DCL - Device Clear - See SDC
DCL is a GPIB (488.1) command used to gain control of the instruments on the bus. See SDC.
3.3.4 DIAGnostic:COMPatibility[?] - Compatibility Mode
DIAGnostic:COMPatibility OFF|T2100 allows an HMC-T2200 series synthesizer to emulate an
HMC-T2100 synthesizer.
The following are effected:
• FREQuency - minimum, maximum, and resolution
• POWer - minimum, maximum
• SWEep:DWELl - minimum
You must power cycle the unit to cause changes to DIAG:COMP to take effect.
DIAGnostic:COMPatibility? is the query form; it returns OFF or T2100.
DIAG:COMP is supported by the HMC-T2220/HMC-T2240 SW Version 2.2 and later.
See Also: FREQuency:RESolution.
3.3.4.1 Example: DIAGnostic:COMPatibility
diag:comp off
<<< power cycle >>>
*idn?
Hittite,HMC-T2240,000010,2.2 4.4
freq? min; freq? max
14
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
10000000;40000000000
pow? min; pow? max
-60.0;30.0
swe:dwel? min; dwel? max
0.000300;4294.967044
freq:resolution?
1
diag:comp T2100
<< power cycle >>
*idn?
Hittite,HMC-T2100,000010,2.2 4.4
freq? min; freq? max
10.00e6;20000.00e6
pow? min; pow? max
-36.0;27.0
swe:dwel? min; dwel? max
0.000100;4294.967044
freq:resolution?
0.01e6
diag:compatibility?
T2100
3.3.5 DIAGnostic:MACaddress?
Read the MAC Address from the unit.
MAC addresses are used for Ethernet communication. The MAC Address is programmed at the factory, and cannot be changed, but it may be helpful to read back for debug purposes.
Your router may also have a utility which will tell you the MAC address of everything connected to it.
See Also:
SYSTem:COMMunicate:ETHernet:ADDRess,SYSTem:COMMunicate:ETHernet:DHCP
3.3.5.1 Example: Read theMAC Address from a HMC-T2240
DIAG:MAC?
00242a987654
3.3.6 DISPlay:ENABle[?] - LCD ON/OFF
DISPlay:ENABle OFF causes the following to appear on the front panel LCD:
DISPLAY IS
CURRENTLY OFF
The display can be turned back on with DISP: ENAB ON.
The query form is DISPlay:ENABle? which returns 1 or 0.
The reset (*RST) state is ON. Because the SECurity commands are not implemented, the display will go to a different state whenever *RST is issued, per SCPI-99. However the reset state
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
15
HMC-T2200 Synthesized Signal Generator Family User Manual
of DISP:TEXT:STAT is not dened by SCPI, so *RST will not change it, and any text written with
DISP:TEXT will remain visible even if *RST is used.
Turning the display off does not particularly improve performance.
See Also: DISPlay:[WINDow:]TEXT[:DATA], DISPlay:[WINDow:]TEXT:STATe
3.3.6.1 Example: Preventing the display from changing at *RST
DISP: ENAB OFF
DISP: TEXT:STAT ON
3.3.7 DISPlay:[WINDow:]TEXT:CLEar
DISPlay:TEXT:CLEar causes the front panel LCD to go blank.
There is no query form.
There is no effect from *RST.
See Also: DISPlay:[WINDow:]TEXT[:DATA]
v02.1110
3.3.8 DISPlay:[WINDow:]TEXT[:DATA]
DISP:TEXT “message” displays a message on the front panel LCD.
The LCD is 20 rows wide and 2 rows high. Text which goes beyond the end of the line will be
wrapped. To show text on the second row, without overwriting the rst row, use DISPlay:[WINDow:]
TEXT:LOCate.
The query form DISPlay:[WINDow:]TEXT[:DATA]? may give incomplete or out of date results if the
display has not had an opportunity to update, or is in the middle of an update.
The text on the LCD is not affected by *RST when DISP:TEXT:STAT ON.
3.3.8.1 Example: Front Panel LCD control
DISP:ENAB OFF
DISP:TEXT?
DISPLAY IS CURRENTLY OFF
DISP:ENAB ON
DISP:TEXT?
10,005,000,000 R I-60.0dBm* OFF
DISP:TEXT:CLEar
DISP:TEXT?
10,005,000,000 R I-60.0dBm* OFF
Display stays in normal mode unless you turn TEXT on.
DISP:TEXT:STAT ON
DISP:TEXT?
DISP:TEXT “LO Source, Pin 7”
DISP:TEXT?
16
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
LOSource, Pin 7
DISP:TEXT:LOC 2,8
DISP:TEXT “Line 2”
DISP:TEXT?
LO Source, Pin 7 Line 2
DISP:TEXT “over”
DISP:TEXT?’
LO Source, Pin 7 Over 2
DISP:TEXT:LOC 1,1
DISP:TEXT “Line 1”
DISP:TEXT?
Line 1rce, PIN 7 Over 2
It is generally more efficient to write the desired text with additional padding to overwrite any previous
text then to CLEar and then write.
3.3.9 DISPlay:[WINDow:]TEXT:LOCate
DISPlay:[WINDow:]TEXT:LOCate <row>,<col> positions the cursor for the next write with
DISP:TEXT.
<row> row number, 1 or 2
<col> column number, 1 to 20
The cursor is not moved by DISP:TEXT.
The query form is DISPlay:[WINDow:]TEXT:LOCate?, which returns <row>,<col>.
The TEXT mode cursor position is not affected by *RST.
See Also: Example: Front Panel LCD control.
3.3.10 DISPlay:[WINDow:]TEXT:STATe
DISPlay:[WINDow:]TEXT:STATe {ON|OFF} changes the front panel LCD to text mode so the output
of DISPlay:[WINDow:]TEXT or DISPlay:[WINDow:]CLEar is visible or not.
The value of DISP:TEXT:STATe is not affected by *RST.
The query form, DISPlay:[WINDow:]TEXT:STATe?, returns 1 or 0.
See Also: DISPlay:[WINDow:]TEXT, Example: Front Panel LCD Control.
3.3.11 *ESE[?] - Event Status Enable
*ESE <mask> determines which of the bits in the Standard Event Status Register (ESR) are sum-
marized by bit 5 of the Status Byte (STB.)
<mask> is in the range 0 to 255.
Query Form: ESE?.
*ESE? is affected by FORMat:SREGister.
Reset Value: 0
See Also: *STB?, *ESR?, *SRE
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
17
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.11.1 Example: Errors Propagate to STB
Set standard Event Status Enable and read it back.
*ese #h3c
*ese?
60
form:sreg hex
*ese?
#H3C
Verify STB (standard STatus Byte) is clear.
*stb?
#H00
Generate an error and verify it shows up in STB.
oops
*stb?
#H24
Reading the error message clears the Error/Event Queue bit (0x04.).
syst:err:all?
-113, “Undened header; oops”
*stb?
#H20
v02.1110
The ESR summary bit will remain set until ESR is read..
*esr?
The msb of the ESR is Power On. This will be set after the unit is turned on.
#HA0
Reading ESR clears ESR and the ESR summary bit..
*esr?
#H00
*stb?
#H00
3.3.12 *ESR? – Event Status Register
*ESR? reads the Standard Event Status Register and clears it.
The ESR is “sticky” in that it keeps its bits high until they are cleared even if the condition that caused
them to be set is no longer true.
The result is in the range 0 to 255.
There is no command to set the ESR.
Reading the ESR clears it. To clear the ESR without reading its contents, see *CLS.
*ESR? is affected by FORMat:SREGister.
See Also: *ESE, *STB, FORMat:SREGister
18
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.12.1 The bits in the ESR:
(0 is least signicant)
0. Operation Complete (See *OPC)
1. Unused (The HMC-T2240 cannot be a GPIB controller.)
2. Query Error
3. Device Dependent Error
4. Execution Error
5. Command Error
6. User Request (Front panel knob pressed and held, whether in local lockout/KLOCk
or not.)
7. Power On (Set when unit turns on. Cleared by rst *ESR? or *CLS.)
The “Error” bits indicate that errors, broken down by SCPI category, have happened. Read the actual
error from the error queue using SYSTem:ERRor[:NEXT]?.
3.3.12.2 Example: Detect an error
a_bad_command
*esr?
32
^^--- Bit 5 à Error. Find out which one:
SYSTem:ERRor?
-113 “Undened header; a_bad_command”
This is the SCPI dened error for an unrecognized command.
3.3.13 FORMat:SREGister[?] – Decimal/Hex/Binary
FORMat:SREGister <format> selects the output format for status registers.
<format> can be:
• ASCii – Base 10 (Decimal, Reset value)
• HEXadecimal – Base 16 (#H0123ABCD)
• BINary – Base 2 (#B010101)
The query form, FORMat:SREGister?, returns ASC, HEX, or BIN.
It has no effect on Frequency, Power, or “Boolean” values.
3.3.13.1 Example: FORMat:SREGister
form:sreg hex
*ese?
#H3C
form:sreg bin
*ese?
#B111100
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
19
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.14 FREQuency – See [SOURce:]FREQuency
SCPI species the optional “SOURce” keyword before FREQuency.
3.3.15 GET – Group Execute Trigger (GPIB only)
GET allows multiple instruments to be triggered by the same trigger command over GPIB.
GET is encoded with the ATN signal asserted, not sent as a string. See your GPIB Controller software documentation for the best way to send GET.
GET does not have to go through the SCPI parser so it can be processed with much less latency
than *TRG or TRIGger. However, in order to comply with the GPIB FIFO order requirement for com-
mands, the HMC-T2240 must not be busy when GET is sent. If it is busy, GET will be placed in the
input buffer similar to a normal string command and the trigger will be delayed relative to when it
would normally be expected.
To ensure the HMC-T2240 is ready for GET to be sent, send *OPC? and wait for the 1 to come back
before sending GET. This ensures any previous commands have been received, processed, and
completed.
The TRIGger:SOURce must be set to BUS for GET to be received properly.
v02.1110
GET is an event so there is no query form.
See Also: *TRG, Example: GPIB Parallel Poll with GET, TRIGger:SOURce
3.3.15.1 PPE - Parallel Poll Enable (GPIB Only)
PPE is a GPIB encoded command for conguring Parallel Polls. It is not available on any interface
other than GPIB; see *IST if you want to read ist over USB or Ethernet.
Parallel Polls allow the GPIB controller to read status from multiple instruments simultaneously.
Instruments are congured to write their ist information to a particular bit of the 8 bit wide bus which
operates in a wired-OR manner so that multiple instruments can contribute to each bit.
Unlike normal queries, parallel polls and serial polls do not signicantly slow down the HMC-T2240
or add jitter during sweeps.
To disable parallel poll capability, send 0x70 with ATN asserted.
To enable parallel poll capability, send 0x60 ORed with S and P while ATN is asserted.
S is 0x00 or 0x08 and controls the Sense or polarity of the signal read from the GPIB.
S ist Value on GPIB
0 0 Low Voltage - Logic 1
0 1 Unasserted - Logic 0
1 0 Unasserted - Logic 0
1 1 Low Voltage - Logic 1
P is the bit on the bus to write ist to in the range 0 to 7. 0 is the least signicant bit and 7 is the most
signicant bit.
You will need to consult your software or controller documentation for how to set up parallel polls, but
20
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
an example for the National Instruments™ “ib” functions follows.
There is no query form of PPE.
See Also: *PRE, *IST, *STB
3.3.15.1.1 Example: GPIB Parallel Poll with GET
char ppr = 0; // Parallel Poll Response
// Set up a triggered sweep
const char ccc[] =
“trig:sour bus;”
“:freq:star 10e6;stop 1.01e9;step 1e6;mode swe;”
“*PRE #h200;” // Parallel Poll ist - Waiting for Trigger
“:init”
;
// Will stay in “waiting for trigger” state until send *TRG or TRIG
// Send SCPI command to T2240
ibwrt(Device, ccc, sizeof(ccc)-1/*strip NULL*/);
// set up parallel poll on lsb (bit 1 for “1 oriented” GPIB)
// 0x60 --> PPE + congure
// 0x08 --> positive logic
// 0x00 --> lsb
ibppc(Device, 0x60 | 0x08 | 0x00);
// Run parallel poll
ibrpp(Device, &ppr);
if (0x01 != ppr) {
printf(
“Parallel poll for Waiting for Trigger failed: Got 0x%02x; expected 0x01; ibsta = 0x%02x\n”,
ppr, ibsta);
}
// Send Trigger: GET – Group Execute Trigger
ibsta_val = ibtrg(Device);
// Should no longer be waiting for trigger.
// Parallel poll to verify
ibrpp(Device, &ppr);
if (0x00 != ppr) {
printf(
“Parallel poll for NOT Waiting for Trigger failed: Got 0x%02x; expected 0x00; ibsta = 0x%02x\n”,
ppr, ibsta);
}
3.3.16 *IDN? – Identify
*IDN? produces an identication string including the manufacturer’s name (Hittite), the model (HMCT2240), the serial number, and revision information.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
21
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.16.1 Example: *IDN?
*IDN?
Hittite,HMC-T2240,000006,X.X X.X
3.3.17 INITiate:CONTinuous[:ALL][?] – Start Sweeping
INITiate:CONTinuous[:ALL] {ON|OFF} enables sweeping so that sweeping will continue until this
command, *RST, SYSTem:PRESet, FREQ:MODE or POW:MODE is used to turn it off again.
Turning INIT:CONT OFF will allow the currently running sweep to terminate normally. To stop the current sweep immediately, use ABORt or change the MODE. Note that if INIT:CONT is left ON after
ABORt, the sweep will restart immediately.
Executing *OPC? or *WAI with INITiate:CONTinuous ON will cause the unit to appear to hang. It will
continue to sweep, but any commands after *OPC? or *WAI will be ignored. See SDC.
The query form, INITiate:CONTinuous[:ALL]? returns 0 if continuous sweeping is OFF and 1 if it is
ON.
If TRIGger:SOURce is not IMMediate, each sweep will wait for a trigger.
v02.1110
If SWEep:COUNt is N, each trigger will result in N sweeps. (Note: Triggers which happen while a
sweep is in progress are ignored or result in errors.) If INIT:CONT OFF is used, the total number of
sweeps will be a multiple of N.
FREQ:MODE must be SWEep for the unit to begin sweeping frequency or POW:MODE must be
SWEep to begin sweeping power.
3.3.17.1 Example: Start Continuous Sweep
freq:star 1e9;stop 2e9;step 100e6;mode swe
swe:dwel 0.1
init:cont on
<let sweep run>
init:cont off
3.3.18 INITiate[:IMMediate][:ALL] – Start a Single Sweep
INITiate starts a sweep.
If TRIGger:SOURce is IMMediate, the sweep begins when this command is issued. Otherwise, it
waits for a trigger.
If SWEep:COUNt is N, each trigger or INIT will result in N sweeps. (Note: Triggers which happen
while a sweep is in progress are ignored or result in errors.)
FREQ:MODE or POWer:MODE must be SWEep or an error will be generated.
Sweep parameters, such as the FREQ:STARt and FREQ:STOP, are sampled at INIT time. If
INIT:CONTinuous ON, each time the sweep re-starts, the parameters are re-sampled. An ABORt
forces a continuous sweep to re-INIT, if you don’t want to wait for the sweep to complete normally.
INITiate is an event; there is no query form.
22
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.18.1 Example: Start Sweep with Trigger
This initiates a sweep, but the sweep does not actually begin until the *trg command is received.
freq:mode sweep
trig:source bus
init
*trg
3.3.19 *IST? - Individual Status
*IST? reads the IEEE 488.1 (GPIB) parallel poll Individual Status ag.
1 ist is true
0 ist is false
There is no command to set ist directly; use *PRE to select the bits ist monitors.
*IST? can be used from any interface, GPIB or otherwise.
See Also: *PRE, PPE, *STB
3.3.20 OUTPut[:STATe][?] – RF Output On/Off
OUTput {OFF|ON} controls the RF Output ON/OFF function. Note that enabling and disable the RF
Output affects attenuators and/or frequency in order to minimize RF leakage.
OUTPut[:STATe]? returns 0 for OFF and 1 for ON.
Specify OUTput next to FREQuency and POWer on the same line to enable optimization.
3.3.20.1 Example: RF On/Off State
To Set and Query the RF output state:
OUTPut ON
OUTP?
1
OUTP OFF
OUTP?
0
3.3.20.2 Example: Output with Frequency and Power
Specifying Frequency and Power with Output allows some optimization as all three commands affect
the attenuators. Order is not important, but they should not be separated by other commands.
freq 16.384GHz;pow 17.2dBm;outp on
3.3.21 *OPC – Operation Complete Command
*OPC sets a ag which causes the ESR Operation Complete bit (bit 0) to be set when a sweep is
done. If no sweep is initiated, the ESR Operation Complete bit is set immediately.
ABORt, *CLS, *RST, SDC, and STATus:PRESet clear this operation whether the sweep completes
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
23
HMC-T2200 Synthesized Signal Generator Family User Manual
or not.
*OPC does not have a query form that reads back the *OPC ag. See *OPC?.
See Also: *ESR?, *OPC?, *WAI
3.3.21.1 Example: Operation Complete
*ESR?
#H00
Status is clear
*OPC
*ESR?
#H01
Status is Operation is Complete
INIT:CONT ON
*OPC
*ESR?
#H00
v02.1110
Status is clear – sweep still running
INIT:CONT OFF
*ESR?
#H01
Status is Operation is Complete – It took long enough to type “*ESR?” that the last sweep completed.
3.3.22 *OPC? – Operation Complete Query
*OPC? returns a “1” when the current operation is complete. Since sweeps are the only “overlapped”
operations, *OPC? returns immediately unless a sweep has been initiated.
Since *OPC? blocks other operations from executing until the sweep completes, issuing *OPC? when
INIT:CONTinuous ON will cause the HMC-T2240 to appear to hang. (The sweep will continue, but
commands which are sent will be queued up waiting for *OPC? to complete.) To break this deadlock,
see SDC.
3.3.22.1 Example: Monitoring Sweep Status
swe:dwel 0.1
freq:star 1e9;stop 2e9;step 100e6;mode swe
init;:stat:oper:cond?;*opc?;:stat:oper:cond?
8;1;0
The leading “8” came out noticeably before the “;1;0”, where the “1” is from *OPC? and the “0” is
from STATus:OPERation:CONDition?.
3.3.23 POWer – See [SOURce:]POWer
POWer is specied under the SCPI optional keyword SOURce.
24
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.24 *PRE[?] - Parallel Poll Register Enable
*PRE <mask> (Parallel Poll Register Enable Command) selects the bits to summarize in ist for IEEE
488.1 (GPIB) parallel polls, similar to *SRE for service requests.
<mask> is in the range 0 to 65535. The low 8 bits come from STB. The high 8 bits are instrument
specic.
0. not currently used
1. not currently used
2. Error Queue summary
3. STATus:QUEStionable summary
4. MAV – Message Available
5. Event Status Register (*ESR?) summary
6. RQS – Service Request
7. STATus:OPERation summary
8. STATus:OPERation:CONDition SWEeping
9. STATus:OPERation:CONDition Waiting for TRIGger
10-15. not currently used
*PRE is cleared on power cycle and by writing 0 into it.
*PRE? is the readback form. It is affected by FORMat:SREGister.
The GPIB bit that ist is written to during parallel polls, and whether it is inverted or not, is determined
by PPE. (GPIB PP1 – remote Parallel Poll conguration.)
See Also: *IST?, PPE, *STB, *SRE
3.3.25 *RST - Reset
*RST puts the instrument into a consistent state.
Command Reset Value
DISPLay:ENABLE ON
FORMat:SREGister ASCii
INITiate:CONTinuous OFF
OUTPut[:STATe] OFF
*OPC Clears ag to set Operation
[SOURce:]FREQuency:CENTer 10.005 GHz (mid band)
[SOURce:]FREQuency[:FIXed|:CW] 10.005 GHz (mid band)
[SOURce:]FREQuency:MODe CW (sweep off)
[SOURce:]FREQuency:STEP 10 kHz (min)
[SOURce:]FREQuency:SPAN 19.99 GHz (max)
[SOURce:]FREQuency:STARt 10 MHz (min)
[SOURce:]FREQuency:STOP 20 GHz (max)
[SOURce:]POWer:CENTer -4.5 dBm (mid range)
[SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude] -36 dBm (min)
[SOURce:]POWer:MODe FIXed (sweep off)
Complete when sweep done
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
25
HMC-T2200 Synthesized Signal Generator Family User Manual
Command Reset Value
[SOURce:]POWer:STEP 0.1 dB (min)
[SOURce:]POWer:SPAN 63 dB (max)
[SOURce:]POWer:STARt -36 dBm (min)
[SOURce:]POWer:STOP +27 dBm (max)
SWEep:COUNt 1
SWEep:DIRection UP
SWEep:DWELl 3ms
TRIGger:SLOPE POSitive
TRIGger:SOURce IMMediate
3.3.26 SDC – Selected Device Clear – Control Code
SDC is a GPIB (488.1) command used to gain control of an instrument. It breaks out of situations like
*WAI and *OPC? waiting for a sweep which will never terminate because it will never be triggered,
or is set to sweep continuously, or which will take longer than the user is willing to wait.
For a control interface other than GPIB, SDC is encoded as Ctrl-D, or decimal 4, rather than as a character string, and must be sent on a line by itself. For GPIB, it is encoded on the bus by the controller
using control lines.
v02.1110
SDC clears the input and output FIFOs for the interface it is received on and exits any *OPC? or *WAI
commands which may be executing. It does not stop any sweeps which may be in progress or otherwise change instrument state. Status for *OPC and *OPC? is cleared.
SDC is an event; there is no query form.
When rst taking control of a bus, SDC is usually followed by *RST.
3.3.26.1 Example: Using Ctrl-D to Regain Control
Set dwell time to 1 hour and issue *OPC?
swe:dwel 3600
freq:start 10MHz;stop 20GHz;step 10kHz;mode swe
init
*opc?
*STB?
Not responding…
<Ctrl-D><Enter>
*STB?
0
Response came back right away.
stat:oper:cond?
8
Sweep is still running
26
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
abor
stat:oper:cond?
0
Sweep is stopped
3.3.27 [SOURce:]FREQuency:CENTer[?]
FREQuency:CENTer <freq> is used with FREQuency:SPAN, FREQuency:STARt, or
FREQuency:STOP to specify the range of frequencies to sweep over.
<freq> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the standard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20GHz) as an integral or oating point value. The text strings MINimum and MAXimum are also
accepted.
Specifying CENTer with FREQuency:SPAN, FREQuency:STARt, or FREQuency:STOP next to it
on the same line allows the sweep frequencies to be set without going through intermediate states
which could result in extraneous errors or confusing behavior.
The query form returns a value in Hz. It accepts MINimum and MAXimum as arguments.
3.3.27.1 Example: Center and Span
Center and Span:
FREQ:CENT 3e9;SPAN 2e9
FREQ:STARt?;STOP?
2000000000;4000000000
3.3.27.2 Example: Center and Start
FREQ:CENT 3e9;STAR 1e9
FREQ:STARt?;STOP?
1000000000;5000000000
The results of putting these commands on separate lines are different:
*rst
FREQ:STARt?;STOP?
10000000;20000000000
freq:cent 3e9
FREQ:STARt?;STOP?
10000000;20000000000
syst:err?
250,”FREQ-Sweep Calculation ERROR; Calc By[FREQ-Center 3000000000 FREQ-Span
39990000000] outside of range [10000000,40000000000]”
freq:start 1e9
FREQ:STARt?;STOP?
1000000000;20000000000
freq:cent?
10500000000
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
27
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.27.3 Example: Center Frequency Min/Max
freq:cent? min
10000000
freq:cent? max
40000000000
3.3.28 [SOURce:]FREQuency[:FIXed|:CW][?] – Output Frequency/frequency
FREQuency <freq> species the RF output when the unit is not in sweep mode. (FREQ:MODE CW
or FREQ:MODE FIXed) Setting FREQ in sweep mode results in an error according the the SCPI
standard.
<freq> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the standard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20 GHz) as an integral or oating point value. The text strings MINimum, MAXimum, UP, and
DOWN are also accepted.
The query form returns a value in Hz. It accepts MINimum and MAXimum as arguments.
See Also: FREQuency:MODE, FREQuency:STEP
v02.1110
3.3.28.1 Example: Frequency Commands
freq 3.14159e9
frequency 2GHz
source:frequency:cw 20e9
sour:freq:x 10MHz
freq:cw 20000000000.000
freq?
20000000000
freq:step 100MHz
freq down
freq?
19900000000
freq up
freq?
20000000000
freq minimum
freq?
10000000
freq maximum
freq?
40000000000
freq? min
10000000
freq? max
40000000000
28
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.29 [SOURce:]FREQuency[:FIXed|:CW]:STEP[:INCRement][?] – Frequency Step
FREQuency:STEP <step> species the step size for sweeps and the UP and DOWN keywords
when used with the FREQuency command.
<step> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the standard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20 GHz) as an integral or oating point value. The text strings MINimum and MAXimum are also
accepted.
The query form returns a value in Hz. It accepts MINimum and MAXimum as arguments.
3.3.29.1 Example: Frequency Step
freq:step?
100000000
freq:step? min
1
freq:step? max
39990000000
freq:step 1234.56MHz
3.3.30 [SOURce:]FREQuency:MODE – Sweep Enable
FREQuency:MODE {CW|FIXed|SWEep} controls whether the HMC-T2240 is congured for a
stepped sweep or for single frequency (CW or FIXed) operation.
The query form returns CW or SWE.
3.3.30.1 Example: FREQuency:MODE[?]
*rst
freq:mode swe
swe:dwel min
init
Copied the following in separately to introduce a delay:
freq?
22370000
Copied the following in separately to introduce a delay:
freq:mode cw
freq?
44760000
Note that leaving sweep mode terminated the sweep immediately. *WAI could have been used to wait
until the sweep completed.
3.3.31 [SOURce:]FREQuency:RESolution[?]
FREQuency:RESolution <step> forces all frequencies to be a multiple of <step>.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
29
HMC-T2200 Synthesized Signal Generator Family User Manual
The reset value for FREQ:RES is:
Synthesizer Frequency Resolution
HMC-T2100 10 kHz
HMC-T2200 1 Hz
unless the Synthesizer is a HMC-T2200 in compatibility mode (DIAG:COMP T2100), in which case
the reset value becomes the HMC-T2100 reset value.
Changing FREQ:RES to a value greater than 10 MHz will affect the minimum frequency the unit can
be programmed to.
FREQ:RES is primarily tested at 1 Hz and 10 KHz but values from 1 Hz to 9.999999999e9 can be
programmed. Values like 3.333333333 MHz will be rounded to the nearest 1 Hz. This may result in
unexpected behavior, particularly when the front panel knob is used to set the frequency. This will also
change the MAXimum and MINimum frequency values.
For frequency resolutions which are multiples of 10 kHz, frequencies read back from the unit will be
in HMC-T2100 format.
The query form is FREQ:RES?.
v02.1110
FREQ:RES is supported on the HMC-T2200 series for SW Version 2.2 and later.
See Also: DIAGnostic:COMPatibility
3.3.31.1 Example: Frequency Resolution
diag:comp?
T2100
freq:res?
0.01e6
freq:res 1
freq:res?
1
freq:res 2.7182818284e9
freq:res?
2718281828
freq?
freq?
10873127312
freq 10e6
syst:err:all?
200,”FREQuency out of range; 0 outside of range [271828128,19027972796]:
freq:res? min; res? max
1;9999999999
3.3.32 [SOURce:]FREQuency:SPAN[?]
FREQuency:SPAN <freq> is used with FREQuency:CENTer, FREQuency:STARt, or
FREQuency:STOP to specify the range of frequencies to sweep over.
<freq> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the stan-
30
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
dard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20 GHz) as an integral or oating point value. The text strings MINimum and MAXimum are also
accepted.
Specifying SPAN with FREQuency:CENTer, FREQuency:STARt, or FREQuency:STOP next to it
on the same line allows the sweep frequencies to be set without going through intermediate states
which could result in extraneous errors or confusing behavior. If more than two of these commands
are specied on one line next to each other the last two take effect.
The query form returns a value in Hz. It accepts MINimum and MAXimum as arguments.
See Also: FREQuency:CENTer
3.3.33 [SOURce:]FREQuency:STARt[?]
FREQuency:STARt <freq> is used with FREQuency:STOP, FREQuency:CENTer, or
FREQuency:SPAN to specify the range of frequencies to sweep over.
<freq> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the standard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20 GHz) as an integral or oating point value. The text strings MINimum and MAXimum are also
accepted.
Specifying START with FREQuency:CENTer, FREQuency:SPAN, or FREQuency:STOP next to it
on the same line allows the sweep frequencies to be set without going through intermediate states
which could result in extraneous errors or confusing behavior. If more than two of these commands
are specied on one line next to each other the last two take effect.
The query form returns a value in Hz. It accepts MINimum and MAXimum as arguments.
See Also: FREQuency:CENTer
3.3.34 [SOURce:]FREQuency:STOP[?]
FREQuency:STOP <freq> is used with FREQuency:STARt, FREQuency:CENTer, or
FREQuency:SPAN to specify the range of frequencies to sweep over.
<freq> is a frequency in Hz which can be written in scientic notation (1.23456e9) or with the standard units (GHz, MHz, kHz, Hz) as well as by writing out all the digits down to Hz (20000000000.0
for 20 GHz) as an integral or oating point value. The text strings MINimum and MAXimum are also
accepted.
Specifying STOP with FREQuency:CENTer, FREQuency:SPAN, or FREQuency:STARt next to it
on the same line allows the sweep frequencies to be set without going through intermediate states
which could result in extraneous errors or confusing behavior. If more than two of these commands
are specied on one line next to each other the last two take effect.
See Also: FREQuency:CENTer
3.3.35 [SOURce:]POWer:CENTer[?]
POWer:CENTer <pow> is used with POWer:SPAN, POWer:STARt, and POWer:STOP to specify
the range of power to sweep over.
<pow> is a power in dBm and can be written as a number with or without the dBm suffix. The text
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
31
HMC-T2200 Synthesized Signal Generator Family User Manual
strings MINimum and MAXimum are also accepted.
POWer:CENTer? returns the center power in dBm.
Specifying CENTer with POWer:SPAN, POWer:STARt, or POWer:STOP next to it on the same line
allows the sweep power values to be set without going through intermediate states which could result
in extraneous errors or confusing behavior.
See Also: [SOURce:]POWer:SPAN, [SOURce:]POWer:START, [SOURce:]POWer:STOP,
[SOURce:]FREQuency:CENTer, [SOURce:]POWer:STEP
3.3.35.1 Example: Setting Up a Power Sweep with Center and Span
pow:cent 0;span 20;step 0.1
pow:star?;stop?
-10.0;10.0
trig:sour imm
pow:mode swe
swe:dir down; dwel 3ms
init
v02.1110
3.3.36 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude][?] - Output Power
POWer <value> sets the RF Output power in dBm into 50 Ohms.
<value> can be written as a number with or without a dBm suffix and also accepts the text strings
MINimum, MAXimum, UP, and DOWN. The effect of UP and DOWN is controlled by POWer:STEP.
The query form returns a oating point number in dBm. It also accepts the strings MINimum and
MAXimum.
3.3.37 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude]:RESolution?
POWer:RESolution? reads the smallest output power change supported by the hardware.
There is no command to change power resolution.
3.3.38 [SOURce:]POWer[:LEVel][:IMMediate][:AMPLitude]:STEP[:INCRement][?]
POWer:STEP <value> sets the amount the output power will change when POWer UP or DOWN is
used, and for power sweeps.
<value> can be a number or the text strings MINimum and MAXimum.
The query form returns a oating point number in dBm. It also accepts the strings MINimum and
MAXimum.
See Also: [SOURce:]POWer
3.3.39 [SOURce:]POWer:SPAN[?]
POWer:SPAN <pow> is used with POWer:CENTer, POWer:STARt, and POWer:STOP to specify
the range of power to sweep over.
32
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
<pow> is a power in dBm and can be written as a number with or without the dBm suffix.
Specifying SPAN with POWer:CENTer, POWer:STARt, or POWer:STOP next to it on the same line
allows the sweep power values to be set without going through intermediate states which could result
in extraneous errors or confusing behavior.
See Also: [SOURce:]POWer:CENTer, [SOURce:]POWer:START, [SOURce:]POWer:STOP
3.3.40 [SOURce:]POWer:STARt[?]
POWer:STARt <pow> is used with POWer:CENT, POWer:SPAN, and POWer:STOP to specify the
range of power to sweep over.
<pow> is a power in dBm and can be written as a number with or without the dBm suffix. The text
strings MINimum and MAXimum are also accepted.
NOTE: POWer:STARt must be less than POWer:STOP.
POWer:STARt? returns the starting power in dBm.
Specifying STARt with POWer:SPAN, POWer:CENTer, or POWer:STOP next to it on the same
line allows the sweep power values to be set without going through intermediate states which could
result in extraneous errors or confusing behavior.
See Also: [SOURce:]POWer:SPAN, [SOURce:]POWer:CENTer, [SOURce:]POWer:STOP,
[SOURce:]FREQuency:CENTer, [SOURce:]SWEep:DIRection
3.3.40.1 Example: Setting Up a Power Sweep with Start and Stop
pow:star -10;stop +20;step 0.1;mode swe
init
pow:cent?;span?
5.0;30.0
3.3.41 [SOURce:]POWer:STOP[?]
POWer:STOP <pow> is used with POWer:CENTer, POWer:SPAN, or POWer:STARt to specify the
range of power to sweep over.
<pow> is a power in dBm and can be written as a number with or without the dBm suffix. The text
strings MINimum and MAXimum are also accepted.
NOTE: POWer:STARt must be less than POWer:STOP.
POWer:STARt? returns the starting power in dBm.
Specifying STOP with POWer:SPAN, POWer:STARt, or POWer:CENTer next to it on the same line
allows the sweep power values to be set without going through intermediate states which could result
in extraneous errors or confusing behavior.
See Also: [SOURce:]POWer:SPAN, [SOURce:]POWer:START, [SOURce:]POWer:CENTer,
[SOURce:]FREQuency:CENTer, [SOURce:]SWEep:DIRection
3.3.42 [SOURce:]SWEep:COUNt[?]
SWEep:COUNt <number> determines the number of sweeps that happen for each TRIGger/*TRG,
or INIT if TRIGger:SOURce IMMediate.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
33
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.43 [SOURce:]SWEep:DIRection[?]
SWEep:DIRection {UP|DOWN} determines whether sweeps have increasing or decreasing frequen-
cy. FREQ:STARt must always be less than FREQ:STOP; POW:STARt must be less than POW:STOP.
The query form returns the string UP or DOWN.
3.3.43.1 Example: Sweep Direction
sweep:dir?
UP
sweep:dir down
sweep:dir?
DOWN
3.3.44 [SOURce:]SWEep:DWELl[?]
SWEep:DWELl <number> controls the time each frequency or power is held stable during a sweep.
<number> is a time in seconds with 1usec resolution or the string MINimum or MAXimum.
While the unit is sweeping, a timer determines when each frequency or power change starts. It
takes a certain amount of time to change from the current frequency to the new frequency. This
time is called the Frequency Change time. When the Frequency Change time is over, the Dwell time
begins. At the end of the Dwell time, the timer signals the next frequency change or the completion
of the sweep. The timer period is therefore the sum of the Frequency Change time and Dwell time.
The frequency change time is 250 usec and the minimum dwell time varies by model. The time for
the rst point after trigger is:
v02.1110
Model Min. Dwell Min. Period Min. Delay from Trigger
HMC-T2240 300usec 550usec 500usec
Sending commands to the unit during a sweep can delay when the frequency changes actually happen, cutting into the Dwell time. Delays are not cumulative.
3.3.44.1 Example: Dwell Time
swe:dwel 0.1s
swe:dwel?
0.100000
swe:dwel? min
0.000100
3.3.45 [SOURce:]TRIGger:SLOPe POSitive|NEGative|EITHer[?]
TRIGger:SLOPe <slope> determines whether the EXTernal (BNC) trigger input responds to rising
edges (POSitive,) falling edges (NEGative,) or whichever comes rst (EITHer,).
<slope> can be:
* POSitive - rising edge (Reset value)
*NEGative - falling edge
*EITHer - whichever edge comes rst
34
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
The query form, [SOURce:]TRIGger:SLOPe?, returns POS, NEG, or EITH.
See Also: TRIGger:SOURce
3.3.45.1 Example: Trigger a sweep on the falling edge
The following sets up a frequency sweep triggered by the falling edge on the EXTernal trigger input.
FREQ:STARt 3e9;STOP 5e9;STEP 5e6;MODE SWEep
TRIG:SOURce EXTernal;SLOPe NEGative
INITiate
Unit will wait for a falling edge on Trigger In.
Use TRIGger to force the sweep to start, or ABORt to exit the INITiated state, if no external trigger
occurs.
3.3.46 *SRE[?] – Service Request Enable
*SRE <mask> enables bits in the Status Byte (STB) to generate a Service Request.
<mask> is a number in the range [0,255].
This is useful with GPIB which has a dedicated service request line. For other interfaces, such as
USB, it is possible to poll using *STB? or use the STATus:SRQChar command to indicate you want
a specic character to be sent to indicate a service request.
*SRE is usually used in conjunction with *ESE to report errors and STATus:QUEStionable:ENABle
to report when the POWer setting goes outside the calibrated range.
The query form is affected by FORMat:SREGister.
3.3.47 STATus:OPERation:CONDition?
STATus:OPERation:CONDition? provides a mechanism to look at the current instrument status.
Unlike the EVENt register, the CONDition register is not sticky, so it can be polled without the need to
do an initial read or call *CLS to clear any stale values.
The query form is affected by FORMat:SREGister.
There is no command to set the CONDition register.
3.3.48 STATus:OPERation Register Bit Denitions
The OPERation status register is 16 bits wide, but the HMC-T2240 only sets the following bits at this
time: (Embedded software rev 1.4)
3 SWEeping – Sweep is initiated and triggered
5 Waiting for TRIGger – Sweep is initiated but not triggered
These bits will not be set in the CONDition register at the same time as they are mutually exclusive.
If TRIGger:SOURce IMMediate, the Waiting for TRIGger bit will not be set before the SWEeping bit
as the instrument does not actually wait.
Other bits may be enabled in the future.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
35
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.48.1 Example: Operation Condition Status
freq:mode swe
trig:sour bus
init
stat:oper:cond?
32
*trg
stat:oper:cond?
8
abor
stat:oper:cond?
0
3.3.49 STATus:OPERation:ENABle[?]
STATus:OPERation:ENABle <mask> allows the state of the OPERation:EVENt status register to be
summarized in bit 7 of the standard status byte (STB.)
<mask> is in the range [0, 65535].
v02.1110
The ENABle registers can be cleared by writing to them or with STATus:PRESet.
The query form is affected by FORMat:SREGister.
See Also: *ESE, *STB?, STATus:OPERation Register Bit Denitions, STATus:OPERation?,
STATus:PRESet
3.3.50 STATus:OPERation[:EVENt]?
STATus:OPERation? reads the sticky EVENt register which holds the value of the
STATus:OPERation:CONDition register if it goes high even momentarily. This allows fast events to be
captured reliably.
The EVENt register is cleared by reading it and by *CLS.
The HMC-T2240 does not support transition lter registers at this time. (Embedded software rev 1.8)
The query form is affected by FORMat:SREGister.
See Also: *ESR?, *STB?, *CLS, STATus:OPERation Register Bit Denitions
3.3.51 STATus:PRESet
STATus:PRESet clears the following status registers:
• STATus:OPERation:ENABle
• STATus:QUEStionable:ENABle
It does not affect *ESE or *SRE, or the EVENt registers.
See Also: *CLS
3.3.52 STATus:QUEStionable:CONDition?
STATus:QUEStionable:CONDition? provides a mechanism to look at the current instrument status.
36
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
Unlike the EVENt register, the CONDition register is not sticky, so it can be polled without the need to
do an initial read or call *CLS to clear any stale values.
There is no command to set the CONDition register.
3.3.53 STATus:QUEStionable Register Bit Denitions
The QUEStionable status register is 16 bits wide, but the HMC-T2240 only sets the following bits at
this time:
3 POWer – The current power is outside the calibrated range.
4 TEMPerature - unit is too hot/cold.
5 FREQuency - Frequency not locked. SOUR:ROSC:SOUR EXT and external 10 MHz
reference not present?
Other bits may be enabled in the future.
9 FAN - One or both fans have failed.
3.3.54 STATus:QUEStionable:ENABle[?]
STATus:QUEStionable:ENABle <mask> allows the state of the QUEStionable:EVENt status regis-
ter to be summarized in bit 7 of the standard status byte (STB.)
<mask> is in the range [0, 65535].
The ENABle registers can be cleared by writing to them or with STATus:PRESet.
The query form is affected by FORMat:SREGister.
See Also: *ESE, *STB?, STATus:QUEStionable Register Bit Denitions, STATus:QUEStionable?,
STATus:PRESet
3.3.55 STATus:QUEStionable[:EVENt]?
STATus:QUEStionable? reads the sticky EVENt register which holds the value of the
STATus:QUEStionable:CONDition register if it goes high even momentarily. This allows fast events to
be captured reliably. It also means you do not have to poll constantly to detect if the output power was
programmed outside the calibrated range.
The EVENt register is cleared by reading it and by *CLS.
The query form is affected by FORMat:SREGister.
The HMC-T2240 does not support transition lter registers at this time. (Embedded software rev 1.8)
See Also: *ESR?, *STB?, *CLS, STATus:QUEStionable Register Bit Denitions
3.3.56 STATus:SRQChar[?] – Service Request over USB
STATus:SRQChar <code> is a Hittite extension to allow service requests to be generated for inter-
faces other than GPIB. This command is inherently not portable to other instrumentation and should
not be used if compatibility is a requirement.
<code> is a value in the range [0 to 256] and should be chosen to be an obvious error signal. 256
turns off the Service Request character.
The query form is affected by FORMat:SREGister.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
37
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.56.1 Example: STATus:SRQChar – Service Request Character
stat:srqc 1
stat:srqc?
1
*SRE #hff
*ESE #hff
sfs
0
The above character appeared as a smiley face in HyperTerminal. “sfs” is not a legal command.
*stb?
100
form:sreg hex
*stb?
#H64
Bit 6 is the Service Request, Bit 5 is the ESR summary, and Bit 2 is the Error Queue summary.
*ESR?
#H20
v02.1110
Command Error
syst:err?;err?
-13,”Undened header”;0,”No error”
Turn off Service Request character
stat:srqc 256
3.3.57 *STB? – Status Byte
*STB? reads the summary Status Byte which reects the state of a number of other status regis-
ters in the system to allow a quick look at whether the instrument needs attention. It is affected by
FORMat:SREGister.
There is no command to write to the STB. It may be cleared by clearing the registers that feed into it.
See Also: *ESR?, STATus:OPERation?, STATus:QUEStionable?, SYSTem:ERRor?, *CLS,
STATus:SRQChar
3.3.58 Status Byte (STB) Bit Denitions
The HMC-T2240 uses the following bits in the Status Byte (STB.)
0, 1 Reserved
2 Error Queue is not empty
3 SCPI QUEStionable Status summary
4 Message Available
38
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
5 IEEE 488 (GPIB) Standard Event Status Register (ESR) summary
6 Service Request
7 SCPI OPERation Status summary
The Message Available bit is not useful on interfaces other than GPIB because other interfaces send
their responses immediately instead of waiting for them to be read.
Reserved bits may be used in the future.
3.3.59 SWEep – See [SOURce:]SWEep
The SWEep subsystem is placed under the SOURce subsystem by SCPI.
3.3.60 SYSTem:COMMunicate:ETHernet:ADDRess[?] – IP Address
SYST:COMM:ETH:ADDRess sets the IP address.
Each IP address on a subnet must be unique. See your network administrator for policies on IP address assignment.
You do not need to set the ADDRess if you are using DHCP.
Only IPv4 addresses (four numbers separated by dots like 192.168.1.27) are supported.
You must power cycle the HMC-T2240 after changing this or any or any other network parameter.
If you are setting ADDRess, you will also need to set the NETMask and GATeway.
SYST:COMM:ETH:ADDRess? reports the current IP adress regardless of whether DHCP is on or
off.
IP addresses are treated as strings. You do not have to send quotes, and the results of queries will
not be quoted.
See Also: SYSTem:COMMunicate:ETHernet:DHCP, SYSTem:COMMunicate:ETHernet:NETMa
sk, SYSTem:COMMunicate:ETHernet:GATeway, SYSTem:COMMunicate:ETHernet:PORT
3.3.60.1 Example: Network conguration with DHCP OFF
Show error messages immediately in case of typo (not for GPIB)
syst:err:beh imm
syst:comm:eth:addr 192.168.1.27
syst:comm:eth:netm 255.255.255.0
syst:comm:eth:gat 192.168.1.1
syst:comm:eth:port 65432
syst:comm:eth:dhcp OFF
Reading values back before unit power cycled shows
some old values
syst:comm:eth:dhcp?;addr?;netm?;gat?;port?
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
39
HMC-T2200 Synthesized Signal Generator Family User Manual
0;196.168.0.5;255.255.0.0;192.168.0.3;65432
Power cycle here
Values programmed above are now in effect
syst:comm:eth:dhcp?;addr?;netm?;gat?;port?
0;192.168.1.27;255.255.255.0;192.168.1.1;65432
3.3.61 SYSTem:COMMunicate:ETHernet:DHCP[?] – Automatic Conguration
SYST:COMM:ETH:DHCP ON|OFF enables or disables Dynamic Host Conguration Protocol. DHCP
ON allows the HMC-T2240 to get its IP Address, subnet mask, and default gateway IP address automatically when it connects to a network.
See your network administrator to nd out if you can use DHCP or must use static IP addresses.
You must still set the socket port number (SYSTem:COMMunicate:ETHernet:PORT) even if you are
using DHCP, if you are using sockets.
Most routers support DHCP, although they allow you to turn it off. Most PCs are not congured to be
DHCP servers, so you may not be able to use DHCP if you are connecting directly from a PC to the
HMC-T2240 with a crossover cable.
v02.1110
The query form returns 1 for ON and 0 for OFF.
See Also: SYSTem:COMMunicate:ETHernet:PORT, SYSTem:COMMunicate:ETHernet:ADDre
ss, SYSTem:COMMunicate:ETHernet:NETMask, SYSTem:COMMunicate:ETHernet:GATeway
3.3.61.1 Example: Network Conguration with DHCP ON
syst:comm:eth:dhcp on
syst:comm:eth:port 54321
syst:comm:eth:dhcp?;port?
1;54321
Settings do not take effect until unit power cycled
After power cycling
syst:comm:eth:dhcp?;port?;addr?;netm?;gat?
1;54321;10.0.0.2;255.255.255.0;10.0.0.1
3.3.62 SYSTem:COMMunicate:ETHernet:GATeway[?]
SYST:COMM:ETH:GATeway species the default gateway IP Address.
You do not have to set the GATeway address if you are using DHCP.
The HMC-T2240 does not have any features requiring outgoing network access. (No automatic rmware updates or product registration, for instance.) However, the gateway must be set to a reasonable value for the unit to work correctly. Setting the gateway to the unit’s own address will cause it
to hang. You must disconnect the network cable, power cycle the unit, and x the gateway address
through USB or GPIB to recover.
The query form returns the IP address as an unquoted string.
See Also: SYSTem:COMMunicate:ETHernet:DHCP, SYSTem:COMMunicate:ETHernet:ADDRe
ss
40
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.63 SYSTem:COMMunicate:ETHernet:NETMask[?]
SYST:COMM:ETH:NETMask species the subnet mask.
You do not have to set the NETMask if you are using DHCP.
The HMC-T2240 NETMask setting should match the net mask of the router or PC it is connected to.
See your Network Administrator if you do not know what setting to use.
The query form returns an unquoted string, typically something like:
255.255.255.0
See Also: SYSTem:COMMunicate:ETHernet:DHCP, SYSTem:COMMunicate:ETHernet:ADDRe
ss
3.3.64 SYSTem:COMMunicate:ETHernet:PORT[?] – Socket Number
SYST:COMM:ETH:PORT <number> species the port number to use for socket connections.
The port number is not congured by DHCP, so you must set it explicitly if you wish to use sockets.
<number> is in the range 0 to 65535.
If you are already using a particular socket number for your applications, set the HMC-T2240 to use
that number too.
If you do not already have a standard port number, pick one from the range 49152-65535. Lower
number ports may already be in use (23 = Telnet) or be used in the future (80 = HTTP, 111 = VXI-11,
5044 = LXI, for example) or may be used by common network protocols resulting in interference or
future incompatibility.
The query form is not affected by FORMat:SREG.
See Also: SYSTem:COMMunicate:ETHernet:DHCP, SYSTem:COMMunicate:ETHernet:ADDRe
ss
3.3.65 SYSTem:COMMunicate:GTLocal
GTLocal enables control of the HMC-T2240 from the front panel knob and button even if SYSTemKLOCk is set. The user does not have to press and hold the front panel knob to take the unit out of
remote.
This is a Hittite extension and is not portable. Do not use if compatibility with other instruments is
required.
GTLocal is an event; it does not have a query form.
3.3.65.1 Example: Go To Local
SYST:COMM:GTL
3.3.66 SYSTem:COMMunicate:GTRemote
GTRemote puts the unit under remote control. If KLOCk is enabled, the user cannot get control back
by pressing and holding the front panel knob. If the user does press and hold the front panel knob, the
ESR “User Request” bit is set, and that bit can be polled or connected to the service request mechanism so the controlling computer can send SYST:COMM:GTLocal to re-enable front panel control at
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
41
HMC-T2200 Synthesized Signal Generator Family User Manual
a point in the program where it is safe to do so.
Since commands which affect the RF Output will put the unit into remote anyway, this command is not
especially useful. (It was created to support the GUI Remote check box.)
This is a Hittite extension and is not portable. Do not use if compatibility with other instruments is
required.
GTRemote is an event; it does not have a query form.
3.3.66.1 Example: Go To Remote
SYST:COMM:GTR
3.3.67 SYSTem:ERRor:ALL? – Read All Error Messages
SYSTem:ERRor:ALL? reads back all the error messages from the error queue.
If there are no error messages in the queue, the result is 0, “No error”.
NOTE: This query can respond with > 256 characters because each error message may be up to 256
characters and the error queue can hold up to 10 error messages plus the -350, “Queue overow”
message for a total of up to 2583 characters.
v02.1110
See Also: SYSTem:ERRor[:NEXT]?, *CLS
3.3.67.1 Example: Read All Error Messages from Error Queue
typo
oops
freq 0dBm
pow 20GHz
**idn?
syst:err:all?
-113,”Undened header; typo”,-113,”Undened header; oops”,-131,”Invalid suffix; freq
0dBm”,-131,”Invalid suffix; pow 20GHz”,-113,”Undened header; **idn?”
3.3.68 SYSTem:ERRor:BEHavior
SYSTem:ERRor:BEHavior {QUEue|IMMediate} determines whether error messages are queued
per the SCPI standard or issued immediately. The default is QUEued.
This is useful when typing commands in by hand as you don’t have to guess whether you got an error
or not.
This is a Hittite extension and should not be used where portability is required.
The query form returns QUE or IMM.
This function is not affected by *RST.
3.3.68.1 Example: Issue Error Messages Immediately
SYST:ERR:BEH IMM
freq 3
200,”FREQuency out of range; 3 outside of range [10000000,40000000000]”
42
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
pow 20GHz
-131,”Invalid suffix; pow 20GHz”
syst:err:beh que
freq 3
pow 20GHz
syst:err?;err?;err?
200,”FREQuency out of range; 3 outside of range [10000000,40000000000]”;
-131,“Invalid suffix; pow 20GHz”;0,”No error”
3.3.69 SYSTem:ERRor[:NEXT]?
SYSTem:ERRor? reads back error messages from the error queue.
If the error queue is empty, the result is 0,”No error”.
There is no command to write errors into the queue.
See Also: SYSTem:ERRor:BEHavior, *CLS, SYSTem:ERRor:ALL?
3.3.69.1 Example Read Error Message from Error Queue
typo
SYST:ERR?
-113,“Undened header”
freq 27THz
pow -173dBm
SYS:ERR?;ERR?;ERR?
200,“FREQuency out of range; 27000000000000 outside of range [10000000,40000000000]”
;300,“Power out of range; -173.0dBm outside of range [-60.0,35.0]dBm”;0,“No error”
3.3.70 SYSTem:KLOCk[?] – Front Panel Control Lock
SYSTem:KLOCk {ON|OFF} locks out the front panel controls so pressing and holding the front panel
knob does not return to load control.
The query SYSTem:KLOCk? returns 1 for ON and 0 for OFF.
See Also: SYSTem:COMMunicate:GTLocal, SYSTem:COMMunicate:GTRemote, LLO
3.3.70.1 Example: Local Lockout with KLOCk
syst:kloc?
0
syst:klock on
syst:kloc?
1
3.3.71 SYSTem:PRESet
SYSTem:PRESet is the same as *RST.
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
43
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.72 *TRG – Trigger
*TRG triggers a sweep. It is an error to send *TRG when the hardware is not in the INITiated state,
waiting for a bus trigger. This includes sending a trigger during a sweep.
*TRG is an event; there is no query form.
*TRG is similar to TRIGger, except TRIGger can be used with TRIGger:SOURCE EXTernal also.
3.3.72.1 Example: *TRG – Trigger
*rst
syst:err:beh imm
*trg
-211,“Trigger ignored;TRIG:SOUR BUS not selected”
trig:sour bus
*trg
-211,“Trigger ignored; not INITiated”
init
-213,”Init ignored; Wrong MODE-of-operation”
freq:mode swe
init
stat:oper:cond?
32
*trg
stat:oper:cond?
8
abor
stat:oper:cond?
0
init
stat:oper:cond?
32
trig
stat:oper:cond?
8
v02.1110
3.3.73 TRIGger[:SEQuence][:IMMediate]
TRIGger is the same as *TRG, except it can cause an EXTernal trigger as welll as a BUS trigger.
3.3.74 TRIGger[:SEQuence][:IMMediate]:SOURce[?]
TRIGger:SOURce {IMMediate|BUS|EXTernal} selects whether a sweep that is INITiated begins im-
mediately or waits for a trigger event to start sweeping.
The query form returns IMM or BUS or EXT.
IMMediate Initiate starts the sweep without waiting for anything else.
BUS *TRG, TRIGger or GPIB GET will start the sweep
EXTernal A rising edge (TTL) on the trigger IO BNC starts the sweep.
See Also: *TRG, TRIGger
44
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
v02.1110
HMC-T2200 Synthesized Signal Generator Family User Manual
3.3.74.1 Example: Trigger Source
trig:sour bus
trigger:source?
BUS
trig:sour immediate
tirg:sour?
IMM
trig:sour external
trig:sour?
EXT
3.3.75 *WAI – Wait for Operation (Sweep) to Complete
*WAI waits for an operation to complete. Since most operations do not return control to the user until
they have completed, *WAI usually does nothing. If a sweep is running, however, *WAI prevents any
further commands from executing until the sweep is completed. This is very similar to the behavior of
*OPC? except that *OPC? returns a “1” when the sweep completes and *WAI does not. *WAI can be
used in conjunction with *OPC?.
If the sweep is never going to terminate, whether because it isn’t going to be triggered or because
SWEep:CONTinuous ON, SDC can cancel the effect of *WAI to allow new commands to be received.
*WAI is an event; there is no query form.
See Also: *OPC, *OPC?, SDC
3.3.75.1 Example: *WAI to Wait for Sweep to Complete
Repeat a frequency sweep at different power levels, starting from +10 dBm.
pow 10dBm;pow:step 5
freq:star 3e9;stop 5e9;step 100e6;mode swe
init;*wai;pow down
*wai prevents the power from changing until each frequency sweep is completed.
init;*wai;pow down
init;*wai;pow down
Order On-Line: www.hittite.com. For technical application questions: Phone: 978-250-3343 or TE@hittite.com
45
Order On-Line at: www.hittite.com
Receive the latest product releases - click on “My Subscription”
20 Alpha Road Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • sales@hittite.com
Loading...