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General| Brand | Kenwood |
|---|---|
| Model | TK-90 |
| Category | Transceiver |
| Language | English |
Recommends safety precautions, including RF connector verification and avoiding explosive atmospheres.
Explains how to enter and perform panel tuning adjustments using the transceiver's keys.
Describes connecting and programming the transceiver using a personal computer and interface.
Explains how to upgrade transceiver firmware for new features or specification changes.
Provides step-by-step instructions for programming the transceiver firmware via PC.
Explains the process of transferring memory channel data between transceivers via MIC connectors.
Details entering and using Dealer Mode for memory channel and function settings.
Guides the installation of the KRK-5 main panel and rear panel onto the transceiver.
Describes the double conversion receive circuit structure and its main signal paths.
Explains the role of the IF filter, noise blanker gate, and optional filter installation.
Details the diode (D452) as a pin diode, the switch for IF signal muting, and AM mode detection.
Explains how the AGC circuit controls the gain of IF amplifiers to maintain signal level input.
Introduces the transmission circuit, noting its double super heterodyne structure.
Details the AF signal path from the microphone terminal through amplification and splitting for modulation.
Describes the feedback loop for controlling transmission power, including ALC and VSF voltage.
Explains circuits for current protection and SWR protection to prevent damage from abnormal conditions.
Outlines the digital control circuit, including the main MCU, EEPROM, and reset IC.
Details the SELCALL signal path through FSK IC for demodulation, power supply, and output.
Describes how AF signals are modulated with carriers for DSB, SSB, AM, and FSK signals.
Lists all necessary test equipment for performing adjustments and measurements.
Explains how to enter, operate, and exit the Test Mode for reception and transmission testing.
Details entering adjustment mode, selecting menu items, and changing setting data.
Provides a comprehensive list of 48 adjustment items with display, condition, alignment, and method details.
Guides adjustment of PGC data for power gain control.
Guides adjustment of TGC data for tracking gain control.
Guides POC data adjustment for 25W power control.
Guides POC data adjustment for 10W power control.
Guides POC data adjustment for 5W power control.
Guides DAC_PGC data adjustment for 50W power control.
Guides hardware alignment for over-current protection of the final stage.
Guides hardware alignment for over-current protection of the drive stage.
Guides DAC_PRO data adjustment for VSWR protection.
Writes the adjustment data to EEPROM using keys.
Guides LO2 frequency adjustment and connection of frequency counter.
Guides LO2 level adjustment using a spectrum analyzer.
Details VCO1 and VCO2 lock voltage adjustments and checks.
Guides adjustment of receive AGC reference value and checks.
Guides adjustment of the TX MCF waveform flatness.
Guides adjustment of the RX MCF after TX MCF adjustment.
Guides adjustment of RF IF gain for maximum AF output.
Guides adjustment of IF gain value and checks the display.
Guides adjustment for 100W power control.
Guides adjustment for 50W power control.
Guides adjustment of over-current protection for the final stage.
Guides adjustment of over-current protection for the drive stage.
Guides adjustment of VSWR protection using specific keys.
Explains how to update the KPE-2 unit's firmware for new features or modifications.
Provides step-by-step instructions for programming the KPE-2 firmware via PC.
Lists general specifications like frequency range, channels, operating voltage, and dimensions.
Details receiver sensitivity, selectivity, spurious response, and audio output.
Lists transmitter power output, spurious emission, carrier suppression, and microphone impedance.
