Actually a real time analyzer and an oscilloscope would be OK for tape deck work along with a pink noise gen and a sweep oscillator.
https://www.bkprecision.com/products/signal-generators/4012A-5-mhz-sweep-function-generator.html
Very unlikely to stay in budget without a computer. even used.
There are some oscilloscopes that have eight bit spectrum analyzers that can be used for audio. They seem to be mostly from China.
https://www.bkprecision.com/products/signal-generators/4012A-5-mhz-sweep-function-generator.html
Very unlikely to stay in budget without a computer. even used.
There are some oscilloscopes that have eight bit spectrum analyzers that can be used for audio. They seem to be mostly from China.