YAESU FT-980 Computer Aided HF Transceiver Owner’s Manual
- June 9, 2024
- YAESU
Table of Contents
YAESU FT-980 Computer Aided HF Transceiver Owner's Manual
The FT-980 CAT* presents a new leap forward in the amateur field, incorporating an 8-bit microprocessor ( 80C85) for the highest level of built- in computer control ever offered in an all mode, al I so lid state HF transceiver.
Every frequency related function is digital lysin he sized and microprocessor control· led, including all new features such as user programmable band lime its, KHz or S00kHz step tuning and scanning , dual digitalis lays and split frequency offset display capability.
A New Grade of Reception
Two independent receiver front ends are included, one for continuous general cover· age reception from 1 S0kHz to 29.99999 MHz, and t he other for the amateur bands only . Seven high less JFETs are used in the early receiver stages, providing extrabold· Naraly wide dynamic range ; and ten VCOs ere used over the local signal range to to-noise ratio close to the local sierra l. A three-s tap input attenuator is pro voided to deaf I with very strong.
The triple conversion design of the FT-980 receiver incorporates four cascaded stages of IF filtering for all modes, and is equipped for SSB, CW, AM, FSK and FM transcribing in standard mode ls (optional filters for CW and AM available for enhanced selectivity). The IF Width and Shift sys· t erns are digit ally synthesized for the ultimate in flexibility, allowing the operator to choose t he most appropriate receiver bandwidth for optimum readability, even for AM shortwave broadcasts. The latest no is blanker design and independently tenable IF notch and audio peak filters are also included, adding up to comfortable armchair copy even through savage conditions.
The digital tuning system offers the apparat or two totally independent VFOs with a choice of five different methods of tuning; including a flywheel type tuning knob, two-speed scanning in 10Hz steps from the front panel or optional microphone, stepping or step scanning in KHz steps, front panel digital keypad programming, and stepping in 500k Hz steps.
CPU Controlled Memory System
Twelve memory channels are provided , each of which stores the opera t ing mode and source VFO data a long with frequency . Each VFO and each memory can be tuned independently, without affect ing the contents o f the other VFO or memories. A memory checking function is provided to display the contents of all memo, seven while transmitting, without disturbing operations in progress.
When operating on a memory channel, the digital sub display continues to show the kHz digits of the frequency of the last VFO used , while the main display shows the operating frequency with resolution to 10 or l 00Hz (selectable ). The sub display indicates frequency change by scrolling sideways, with a scrolling cursor providing resolution to lkHz. Frequency accuracy is a remarkable ±3 part s per mill ion due to the careful design of the reference and PLL circuits. The microprocessor software main aims the same display (carrier) frequency when modes are changed .
The transmitter sec t ion of the FT·980 aperatesthrough each multiple of
S00kHz that includes an amateur band. Yasi’s AMGC circuit is included , to
block ambient noise
from voice transmissions; and the ALC meter peak hold system makes ALC
adjustment easy. Two me treason the front panel allow simultaneous observation
of both the forward and reverse S\VR indications. or ALC and either
compression (of the RF speech processor), final current or voltage, or output
power in watts. An FM discriminator center tuning meter function is included
for FM reception, and an exceptional IF transmitter monitor circuit is
included for all modes.
The sub display indicates frequency change by scrolling sideways, with a scrolling cursor providing resolution to lkHz. Frequency accuracy is a remarkable ±3 part s per mill ion due to the careful design of the reference and PLL circuits. The microprocessor software main aims the same display (carrier) frequency when modes are changed .
Full break-in OSK is provided for CW operation, as is a CW calibrating (spotting) function for simple zero beating with other stations. CW side tone frequency and FSK shift frequency can both be selected from the rear panel.
Full clarifier functions permit independent receiver and/or transmitter offset tuning from the VFO or memory frequency by up to ± l0 kHz, and clarified frequencies can be transferred directly to a memory. Split frequency operation between a memory and either amateur or general coverage VFOs is possible, even for cross-band splits (except cross-band OSK). Using the two displays, both frequencies can be displayed simultaneously. or one frequency and the actual opt test (difference) frequency can be displayed.
Programmable Bands
Using the TAB function, the operator can program via the front panel pad his own tuning limits; for instance, to limit his scanning to the appropriate sullen for his governmental or li cense class tractions. Two such systems are availabk one for each VFO, and the programme limits for each V FO are stored in RAM and reset or deactivated from the keypad. This system is ideal for shortwave OX listening, along with the SkHz step function on the general coverage VFO; while on the ham VFO, band limits can be programmed crossband, covering the upper portion of one band and tile lower portion of another.
Other features included in the FT-980 are front panel controls for receiver AGC, tone, FM squelch, special “write” button for programming the four protected memory channels, display dim and dial lock buttons, and electronic keyed speed control for the optional internal electronic CMOS keyed. On t he rear panel, special provisions are provided for connection of a linear amplifier designed for OSK, and for an external microcomputer interface (for all frequency control, mode and IF bandwidth functions), as well as connect ions for remote control of other devices, such as a transverter.
The CAT Interface System
Now being introduced in the FT-980, Yaesu’s Computer Aided Transceiver system
is specially designed to provide for external microcomputer control of the
FT-980 and other future Yaesu transceivers. Externally controllable functions
include mode selection, IF passband control and frequency selection and
storage functions. The number of compatible computer systems is increasing all
the time as we develop new interfaces, and transceiver handling software is
being made available through our dealers now.
Compatible computer systems now include:
NEC-PC
Apple II
OPTIONS
SPECIFICATIONS
All measurements for specifications as per Japan Amateur Ind. Assoc. Standards Specifications subject to change without notice or obligation
FROM:
TO:
STAMP
HERE
YAESU MUSEN CO., LTD.
C.P.O. BOX 1 500,
TOKYO, JAPAN
YAESU ELECTRONIC CORPORATION
P.O. BOX 49,
PARAMOUNT, CALIFORNIA 90723