Vishay TSOP38238 application circuit question

[GreyArea]

In the attachment I'm a little confused about the wording underneath the circuit.

It says "components should be in the range of 33R < R1, <1K, C1 > 0.1uF"

Should the value of R1 be 33R or 1K or simply not important and just somewhere between the two? I'd imagine the value is not all that important but I just find it written a bit strangly.

The 33R < R1 is the most perplexing, how can it be less than R1 if R1 is not yet specified, or is it 1K-33R=967R.

Stared at it for more than 5 minutes so thought I'd ask

[floobydust]

It is an RC filter for power for the IR receiver module. It must be quiet power or the range goes down.
Usually 100R-1K and 0.1uF or larger used, it depends on how noisy your 5V rail is to begin with.

[drtaylor]

It just means that R1 should fall between 33R and 1kohm. You wrote a comma where there was just a subscripted 1. So, reading it out would be 33 ohms is less than R1 and R1 is less than 1k. This is just components for filtering. I usually use about 100 ohms for this type of circuit with a 22nF cap. If you make the resistor too large, you limit speed...too small you reduce protection.