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29 Oktober 2022 - 22:34
Return loss bridge rlb 251
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Return loss bridge rlb 251













return loss bridge rlb 251
  1. #RETURN LOSS BRIDGE RLB 251 GENERATOR#
  2. #RETURN LOSS BRIDGE RLB 251 UPDATE#
  3. #RETURN LOSS BRIDGE RLB 251 DRIVER#
  4. #RETURN LOSS BRIDGE RLB 251 PC#

There are a couple of bumps in the graph which could be reduced by averaging several readings (say 10) in the script file, an exercise for the reader.

  • calculation and reporting of the difference between 1 and 2, RL, and from that, VSWR.Ībove is a plot of the calculated Return Loss and VSWR.
  • a ‘measurement’ scan with the DUT attached and.
  • an ‘open’ calibration scan with nothing attached to the RLB DUT port (0dB RL).
    • The script sends configuration commands to the transmitter, and waits for the measurement result and writes it to a log file. Read -p "Stop HID input then ENTER to quit:" obsĪbove is an example *nix Bash script to orchestrate the measurement. $RIGCTLP set_mode RTTY 300 set_freq $freq set_ptt 1 RIGCTLP="$RIGCTL -m $MODEL -r $PORT -s $SPEED" The test is controlled by a script on the PC.

    #RETURN LOSS BRIDGE RLB 251 PC#

    The RFPM1’s USB data logger is connected back to the PC to allow automated recording of the power level. The the antenna system is connected to the DUT port of the RLB, and the other port connected to the RFPM1 power meter. The RF output of the IC-7410 is attenuated to a level safe for the RLB. The PC controls the IC-7410 using the built in USB CIV port. Test configurationĪbove is a block diagram of the test configuration. Essentially, this is the measurement to replicate with the simpler ham shack equipment.

    #RETURN LOSS BRIDGE RLB 251 GENERATOR#

    The objective is to emulate what is achieved with a Spectrum Analyser with Tracking Generator, or Sweep Generator with logging power meter.Ībove is a Return Loss scan of the antenna using a Spectrum Analyser with Tracking Generator and RLB. reducing the tedium of a measurement task.improved accuracy by reducing the risk of recording errors and.measurement of a large number of data points.RFPM1 with USB data logger ( A prototype data logger for RFPM1) and.This article demonstrates an automated Return Loss scan of an antenna using: Another small efficient matching transformer for an EFHW – 2643251002 – #4 – a paired Guanella 1:1 balun.(tr)uSDX – review of the directional coupler ADC design.NanoVNA-H* – my method for firmware updates.RF Power Meter 2 (RFPM2) – 40dB external attenuator calibration and integration.NanoVNA-H4 – battery charge from discharged.ISP programming of the (tr)uSDX – more on SPI.AT-100 ATU Sontheimer coupler using a single binocular ferrite core.How important is directional coupler Directivity?.Digital display for Revex W560 directional wattmeter – part 1.Digital display for VK-AMPS 2kW directional coupler – part 1.Digital display for QRP labs 20W dummy load – part 1.

    #RETURN LOSS BRIDGE RLB 251 UPDATE#

  • NanoVNA-H* – a howto do firmware update using STM32CubeProgrammer.
  • NanoVNA-H – modification of v3.3 PCB to start the bootloader from the jog switch.
  • Digital display for QRP labs 20W dummy load – part 2.
  • Digital display for half wave detector with cubic spline interpolation – part 1.

    • return loss bridge rlb 251

    Digital display for half wave detector with cubic spline interpolation – part 2.Implementation of G5RV inverted V using high strength aluminium MIG wire – 5 year review.Digital display for half wave detector with cubic spline interpolation – part 3.Digital display for half wave detector with cubic spline interpolation – part 4.Trying to make sense of Nanosaver’s R/ω and jX/ω graph.Digital display for DIY 25W dummy load – part 1.Digital display for DIY 25W dummy load – part 2.(tr)uSDX bootloader corruption – a smoking gun.(tr)uSDX bootloader corruption – a smoking gun – an experiment.Chinese 3.0V 16340 CR2 Lithium Ion batteries.Chinese 9.6V 700mAh Tamiya style battery pack.SNTP synchronised clock v0.04 – beta release.(tr)uSDX firmware, bootloader, application – an explanation.

    #RETURN LOSS BRIDGE RLB 251 DRIVER#

  • LED plate driver failure – 24W round plate.
  • FT37-43 for a 49:1 EFHW transformer enquiry.
  • Digital display for DIY 25W dummy load – part 3.
  • Neewer Macro LED Ring Light Flash RF550 – Guide Number.
  • EARU Programmable Thermocouple K J PT100 to 4-20mA Converter TC RTD Input 4-20mA Output Head-mounted Temperature Transducer – first impressions.
  • Setting a torque wrench when using an offset adapter.
  • CG K/ J/ S/ B to 4-20mA 0-1800 Celsius Thermocouple Converter TC Input 4-20mA Output Head-mounted Temperature Transducer – first impressions.
  • What kind of balun is this? Is it any good?.
  • Digital display for DIY 25W dummy load – part 4.
  • Garden environmental telemetry project – part 1.
  • Diagnosis of a 9:1 transformer from NanoVNA plot.
  • Diagnosis of a 9:1 transformer from NanoVNA plot – part 2.
  • Digital directional wattmeter – based on G8GYW – part 1.















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